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 (
    18516, 51007, 51004, 51005, 51010, 51008, 
    51012, 51011, 51013, 51006, 51015, 
    51016, 51021, 51017, 51018, 51019, 
    51024, 51014, 51022, 51422, 51045, 
    51440, 51025, 51424, 51442, 51029, 
    51429, 51436, 51060, 51423, 51020, 
    51430, 51027, 51433, 51063, 51067, 
    51026, 51031, 51062, 51435, 51035, 
    51028, 51441, 51425, 51431, 51033, 
    51432, 51041, 51434, 51030, 51032, 
    51042, 51037, 51059, 51065, 51066, 
    51061, 51064, 51070, 51426, 51038, 
    51050, 51052, 51023, 51039, 51055, 
    51069, 51040, 51034, 51056, 51036, 
    51009, 51068, 51058, 51071
  )

Query time 0.00083

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "105.01"
    },
    "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": 75,
          "rows_produced_per_join": 75,
          "filtered": "100.00",
          "index_condition": "(`test_uchur_k`.`p`.`product_id` in (18516,51007,51004,51005,51010,51008,51012,51011,51013,51006,51015,51016,51021,51017,51018,51019,51024,51014,51022,51422,51045,51440,51025,51424,51442,51029,51429,51436,51060,51423,51020,51430,51027,51433,51063,51067,51026,51031,51062,51435,51035,51028,51441,51425,51431,51033,51432,51041,51434,51030,51032,51042,51037,51059,51065,51066,51061,51064,51070,51426,51038,51050,51052,51023,51039,51055,51069,51040,51034,51056,51036,51009,51068,51058,51071))",
          "cost_info": {
            "read_cost": "45.01",
            "eval_cost": "7.50",
            "prefix_cost": "52.51",
            "data_read_per_join": "1K"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      },
      {
        "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": [
            "test_uchur_k.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 75,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "18.75",
            "eval_cost": "7.50",
            "prefix_cost": "78.76",
            "data_read_per_join": "7K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "test_uchur_k.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 75,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "18.75",
            "eval_cost": "7.50",
            "prefix_cost": "105.01",
            "data_read_per_join": "29K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      }
    ]
  }
}