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 (
    8663, 8779, 8562, 8657, 8689, 8627, 8619, 
    8766, 8838, 8936, 10020, 8910, 8731, 
    10167, 8573, 8916, 8601, 8568, 8655, 
    8667, 8618, 8536, 8566, 8776, 8590, 
    8560, 8914, 8933, 8739, 8748, 8629, 
    8775, 8787, 8783, 8737, 8470, 8742, 
    8567, 8815, 8683, 10174, 8575, 9972, 
    10104, 8581, 9952, 9937, 9968, 8538, 
    8572, 8578, 8580, 9969, 10093, 8540, 
    8574, 8605, 8582, 8599, 10021, 8541
  )

Query time 0.00168

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "87.71"
    },
    "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": 63,
          "rows_produced_per_join": 63,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (8663,8779,8562,8657,8689,8627,8619,8766,8838,8936,10020,8910,8731,10167,8573,8916,8601,8568,8655,8667,8618,8536,8566,8776,8590,8560,8914,8933,8739,8748,8629,8775,8787,8783,8737,8470,8742,8567,8815,8683,10174,8575,9972,10104,8581,9952,9937,9968,8538,8572,8578,8580,9969,10093,8540,8574,8605,8582,8599,10021,8541))",
          "cost_info": {
            "read_cost": "37.31",
            "eval_cost": "6.30",
            "prefix_cost": "43.61",
            "data_read_per_join": "1008"
          },
          "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": 63,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "15.75",
            "eval_cost": "6.30",
            "prefix_cost": "65.66",
            "data_read_per_join": "24K"
          },
          "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": 63,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "15.75",
            "eval_cost": "6.30",
            "prefix_cost": "87.71",
            "data_read_per_join": "6K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}