SELECT 
  v.variant_id, 
  v.product_id, 
  vd.variant, 
  vf.position, 
  vf.color 
FROM 
  cscart_product_features_values v 
  LEFT JOIN cscart_product_feature_variant_descriptions vd ON v.variant_id = vd.variant_id 
  AND vd.lang_code = 'en' 
  LEFT JOIN cscart_product_feature_variants vf ON v.variant_id = vf.variant_id 
WHERE 
  1 
  AND v.feature_id = 1199 
  AND v.product_id IN (
    '35187', '35188', '35178', '35186', 
    '35185', '35184', '35183', '35182', 
    '35181', '35180', '35179', '35169', 
    '35177', '35176', '35175', '35174', 
    '35173', '35172', '35171', '35170', 
    '35160', '35168', '35167', '35166', 
    '35165', '35164', '35163', '35162', 
    '35161', '35159', '35158', '35157', 
    '35156', '35155', '17379'
  )

Query time 0.00169

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "32.10"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "v",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "fl",
            "product_id",
            "fpl",
            "idx_product_feature_variant_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "feature_id",
            "product_id"
          ],
          "key_length": "6",
          "rows_examined_per_scan": 35,
          "rows_produced_per_join": 35,
          "filtered": "100.00",
          "using_index": true,
          "cost_info": {
            "read_cost": "4.10",
            "eval_cost": "3.50",
            "prefix_cost": "7.60",
            "data_read_per_join": "27K"
          },
          "used_columns": [
            "feature_id",
            "product_id",
            "variant_id"
          ],
          "attached_condition": "((`cscartdb`.`v`.`feature_id` = 1199) and (`cscartdb`.`v`.`product_id` in ('35187','35188','35178','35186','35185','35184','35183','35182','35181','35180','35179','35169','35177','35176','35175','35174','35173','35172','35171','35170','35160','35168','35167','35166','35165','35164','35163','35162','35161','35159','35158','35157','35156','35155','17379')))"
        }
      },
      {
        "table": {
          "table_name": "vd",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "variant_id",
            "lang_code"
          ],
          "key_length": "9",
          "ref": [
            "cscartdb.v.variant_id",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 35,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "8.75",
            "eval_cost": "3.50",
            "prefix_cost": "19.85",
            "data_read_per_join": "105K"
          },
          "used_columns": [
            "variant_id",
            "variant",
            "lang_code"
          ]
        }
      },
      {
        "table": {
          "table_name": "vf",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "variant_id"
          ],
          "key_length": "3",
          "ref": [
            "cscartdb.v.variant_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 35,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "8.75",
            "eval_cost": "3.50",
            "prefix_cost": "32.10",
            "data_read_per_join": "39K"
          },
          "used_columns": [
            "variant_id",
            "color",
            "position"
          ]
        }
      }
    ]
  }
}