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 (
    231, 232, 264, 265, 266, 267, 268, 269, 
    270, 318, 319, 320, 321, 322, 323, 3961, 
    3962, 3963, 3964, 3965, 3966, 3967, 
    4006, 4007, 4008, 4009, 4010, 4011, 
    4012, 4066, 4067, 4068, 4069, 4070, 
    4071, 4072, 4073, 4074, 4075, 4076, 
    4077, 4078, 4079, 4110, 4111, 4112, 
    4113, 4114, 4115, 4116, 4149, 4150, 
    4151, 4152, 4153, 4154, 4155, 4202, 
    4203, 4204, 4205, 4206, 4207, 4208, 
    3109, 3123, 6671, 6676, 6684, 5, 6, 7, 
    8, 9, 10, 11, 57, 58, 59, 60, 61, 62, 63, 
    111, 112, 113, 114, 115, 116, 117, 210, 
    211, 212, 213, 214, 215
  )

Query time 0.00079

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "201.61"
    },
    "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": 96,
          "rows_produced_per_join": 96,
          "filtered": "100.00",
          "index_condition": "(`gaseus`.`p`.`product_id` in (231,232,264,265,266,267,268,269,270,318,319,320,321,322,323,3961,3962,3963,3964,3965,3966,3967,4006,4007,4008,4009,4010,4011,4012,4066,4067,4068,4069,4070,4071,4072,4073,4074,4075,4076,4077,4078,4079,4110,4111,4112,4113,4114,4115,4116,4149,4150,4151,4152,4153,4154,4155,4202,4203,4204,4205,4206,4207,4208,3109,3123,6671,6676,6684,5,6,7,8,9,10,11,57,58,59,60,61,62,63,111,112,113,114,115,116,117,210,211,212,213,214,215))",
          "cost_info": {
            "read_cost": "57.61",
            "eval_cost": "9.60",
            "prefix_cost": "67.21",
            "data_read_per_join": "1K"
          },
          "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": [
            "gaseus.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 96,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "24.00",
            "eval_cost": "9.60",
            "prefix_cost": "100.81",
            "data_read_per_join": "37K"
          },
          "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": [
            "gaseus.p.group_id"
          ],
          "rows_examined_per_scan": 3,
          "rows_produced_per_join": 288,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "72.00",
            "eval_cost": "28.80",
            "prefix_cost": "201.61",
            "data_read_per_join": "29K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}