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 (
    10754, 10755, 10756, 10757, 10758, 10759, 
    10880, 10881, 10882, 10883, 10884, 
    10885, 10886, 10887, 10888, 10889, 
    10890, 10891, 10892, 10893, 10894, 
    10895, 10896, 10897, 10898, 10921, 
    10922, 10923, 10924, 10925, 10926, 
    10927, 10928, 10929, 10930, 10931, 
    10932, 10933, 10934, 10935, 10936, 
    10937, 10938, 10939, 10940, 10941, 
    10942, 10943
  )

Query time 0.00065

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "102.66"
    },
    "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": 49,
          "rows_produced_per_join": 49,
          "filtered": "100.00",
          "index_condition": "(`gaseus`.`p`.`product_id` in (10754,10755,10756,10757,10758,10759,10880,10881,10882,10883,10884,10885,10886,10887,10888,10889,10890,10891,10892,10893,10894,10895,10896,10897,10898,10921,10922,10923,10924,10925,10926,10927,10928,10929,10930,10931,10932,10933,10934,10935,10936,10937,10938,10939,10940,10941,10942,10943))",
          "cost_info": {
            "read_cost": "29.16",
            "eval_cost": "4.90",
            "prefix_cost": "34.06",
            "data_read_per_join": "784"
          },
          "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": 49,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "12.25",
            "eval_cost": "4.90",
            "prefix_cost": "51.21",
            "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": [
            "gaseus.p.group_id"
          ],
          "rows_examined_per_scan": 3,
          "rows_produced_per_join": 147,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "36.75",
            "eval_cost": "14.70",
            "prefix_cost": "102.66",
            "data_read_per_join": "14K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}