SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  descr1.product as product, 
  companies.company as company_name, 
  products.product_type, 
  products.parent_product_id, 
  products.variation_sku, 
  companies.discreet_shipping as company_discreet_shipping 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
WHERE 
  1 
  AND companies.status IN ('A') 
  AND products.amount > 0 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
  AND (
    (
      1 
      AND products.product_id IN (
        18638, 57377, 57378, 57379, 57380, 57381, 
        57382, 57383, 57384, 57385, 57386, 
        57387, 57388, 57389, 57390, 57391, 
        57392, 57393, 57394, 57395, 57396, 
        57397, 57398, 57399, 57400, 57401, 
        57402, 57403, 57404, 57405, 57406, 
        57407, 57408, 57409, 57410, 57411, 
        57412, 57413, 57414, 57415, 57416, 
        57417, 57418, 57419, 57420, 57421, 
        57422, 57423, 57424, 57425, 57426, 
        57427, 57428, 57429, 57430, 57431, 
        57432, 57433, 57434, 57435, 57436, 
        57437, 57438, 57439, 57440, 57441, 
        57442, 57443, 57444, 57445, 57446, 
        57447, 57448, 57449, 57450
      )
    ) 
    AND companies.status IN ('A') 
    AND prices.usergroup_id IN (0, 0, 1)
  ) 
GROUP BY 
  products.product_id 
ORDER BY 
  NULL asc

Query time 0.00487

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "58.33"
    },
    "ordering_operation": {
      "using_filesort": false,
      "grouping_operation": {
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "products",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY",
                "status"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "rows_examined_per_scan": 75,
              "rows_produced_per_join": 14,
              "filtered": "19.67",
              "index_condition": "(`cscartdb`.`products`.`product_id` in (18638,57377,57378,57379,57380,57381,57382,57383,57384,57385,57386,57387,57388,57389,57390,57391,57392,57393,57394,57395,57396,57397,57398,57399,57400,57401,57402,57403,57404,57405,57406,57407,57408,57409,57410,57411,57412,57413,57414,57415,57416,57417,57418,57419,57420,57421,57422,57423,57424,57425,57426,57427,57428,57429,57430,57431,57432,57433,57434,57435,57436,57437,57438,57439,57440,57441,57442,57443,57444,57445,57446,57447,57448,57449,57450))",
              "cost_info": {
                "read_cost": "51.03",
                "eval_cost": "1.48",
                "prefix_cost": "52.51",
                "data_read_per_join": "79K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "amount",
                "usergroup_ids",
                "parent_product_id",
                "variation_sku"
              ],
              "attached_condition": "((`cscartdb`.`products`.`amount` > 0) and ((`cscartdb`.`products`.`usergroup_ids` = '') or (0 <> find_in_set(0,`cscartdb`.`products`.`usergroup_ids`)) or (0 <> find_in_set(1,`cscartdb`.`products`.`usergroup_ids`))) and (`cscartdb`.`products`.`status` = 'A'))"
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "key": "product_id",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "cscartdb.products.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "9.00",
              "cost_info": {
                "read_cost": "3.69",
                "eval_cost": "0.13",
                "prefix_cost": "57.67",
                "data_read_per_join": "31"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`cscartdb`.`prices`.`lower_limit` = 1) and (`cscartdb`.`prices`.`usergroup_id` in (0,0,1)) and (`cscartdb`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          },
          {
            "table": {
              "table_name": "companies",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id"
              ],
              "key_length": "4",
              "ref": [
                "cscartdb.products.company_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "10.00",
              "cost_info": {
                "read_cost": "0.33",
                "eval_cost": "0.01",
                "prefix_cost": "58.14",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "company_id",
                "status",
                "company",
                "discreet_shipping"
              ],
              "attached_condition": "(`cscartdb`.`companies`.`status` = 'A')"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "pt",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "cscartdb.products.product_id"
              ],
              "rows_examined_per_scan": 2,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.07",
                "eval_cost": "0.03",
                "prefix_cost": "58.23",
                "data_read_per_join": "4"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "cscartdb.products_categories.category_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "0.07",
                "eval_cost": "0.00",
                "prefix_cost": "58.32",
                "data_read_per_join": "45"
              },
              "used_columns": [
                "category_id",
                "storefront_id",
                "usergroup_ids",
                "status"
              ],
              "attached_condition": "(((`cscartdb`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`cscartdb`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`cscartdb`.`cscart_categories`.`usergroup_ids`))) and (`cscartdb`.`cscart_categories`.`status` in ('A','H')) and (`cscartdb`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "cscartdb.products.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.01",
                "eval_cost": "0.00",
                "prefix_cost": "58.33",
                "data_read_per_join": "51"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          }
        ]
      }
    }
  }
}