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 (
    9743, 10015, 10017, 9721, 9748, 9906, 
    10018, 10331, 10019, 10338, 9761, 10001, 
    9752, 10362, 9722, 9745, 10337, 10000, 
    9746, 10002, 9720, 9998, 10003, 9755, 
    9995, 9999, 9763, 9912, 10342, 9911, 
    9992, 10014, 10306, 10334, 9900, 10330, 
    9910, 10301, 9759, 9905, 10300, 10304, 
    10307, 10308, 10332, 10340, 9750, 9867, 
    10302, 10333, 10336, 10341, 10343, 
    10363, 9757, 9902, 9908, 9984, 9990, 
    10016, 10305, 10329, 10335, 10339, 
    9873, 9891, 9889, 9893, 9987, 10303, 
    9896, 9899, 9986
  )

Query time 0.00121

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "102.21"
    },
    "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": 73,
          "rows_produced_per_join": 73,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (9743,10015,10017,9721,9748,9906,10018,10331,10019,10338,9761,10001,9752,10362,9722,9745,10337,10000,9746,10002,9720,9998,10003,9755,9995,9999,9763,9912,10342,9911,9992,10014,10306,10334,9900,10330,9910,10301,9759,9905,10300,10304,10307,10308,10332,10340,9750,9867,10302,10333,10336,10341,10343,10363,9757,9902,9908,9984,9990,10016,10305,10329,10335,10339,9873,9891,9889,9893,9987,10303,9896,9899,9986))",
          "cost_info": {
            "read_cost": "43.81",
            "eval_cost": "7.30",
            "prefix_cost": "51.11",
            "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": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 73,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "18.25",
            "eval_cost": "7.30",
            "prefix_cost": "76.66",
            "data_read_per_join": "28K"
          },
          "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": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 73,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "18.25",
            "eval_cost": "7.30",
            "prefix_cost": "102.21",
            "data_read_per_join": "7K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}