SELECT 
  f.feature_id, 
  f.purpose, 
  p.product_id, 
  p.parent_product_id, 
  g.id, 
  g.code 
FROM 
  cscart_product_variation_group_features AS f 
  INNER JOIN cscart_product_variation_groups AS g ON f.group_id = g.id 
  INNER JOIN cscart_product_variation_group_products AS p ON f.group_id = p.group_id 
WHERE 
  p.product_id IN (
    62664, 38291, 62098, 38885, 37523, 37795, 
    37811, 38886, 56522, 61792, 62039, 
    37805, 37815, 37817, 38672, 56523, 
    64452, 62155, 11278, 38884, 11273, 
    11301, 37793, 37798, 37810, 56510, 
    60470, 67416, 11282, 37803, 37806, 
    37808, 37812, 37813, 37814, 37819, 
    37824, 56518, 60469, 62071, 62082, 
    62063, 62079, 11286, 37797, 37800, 
    37801, 37816, 56516, 56521
  )

Query time 0.00092

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "70.01"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 50,
          "rows_produced_per_join": 50,
          "filtered": "100.00",
          "index_condition": "(`cscartdb`.`p`.`product_id` in (62664,38291,62098,38885,37523,37795,37811,38886,56522,61792,62039,37805,37815,37817,38672,56523,64452,62155,11278,38884,11273,11301,37793,37798,37810,56510,60470,67416,11282,37803,37806,37808,37812,37813,37814,37819,37824,56518,60469,62071,62082,62063,62079,11286,37797,37800,37801,37816,56516,56521))",
          "cost_info": {
            "read_cost": "30.01",
            "eval_cost": "5.00",
            "prefix_cost": "35.01",
            "data_read_per_join": "800"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "cscartdb.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 50,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "12.50",
            "eval_cost": "5.00",
            "prefix_cost": "52.51",
            "data_read_per_join": "19K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      },
      {
        "table": {
          "table_name": "f",
          "access_type": "ref",
          "possible_keys": [
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "cscartdb.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 50,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "12.50",
            "eval_cost": "5.00",
            "prefix_cost": "70.01",
            "data_read_per_join": "5K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}