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 (
    98, 28, 100, 99, 97, 104, 29, 101, 103, 
    102, 25, 71, 74, 73, 26, 72, 70, 69, 68, 
    24, 75, 76, 67
  )

Query time 0.00234

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "32.21"
    },
    "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": 23,
          "rows_produced_per_join": 23,
          "filtered": "100.00",
          "index_condition": "(`test_uchur_k`.`p`.`product_id` in (98,28,100,99,97,104,29,101,103,102,25,71,74,73,26,72,70,69,68,24,75,76,67))",
          "cost_info": {
            "read_cost": "13.81",
            "eval_cost": "2.30",
            "prefix_cost": "16.11",
            "data_read_per_join": "368"
          },
          "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": 23,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "5.75",
            "eval_cost": "2.30",
            "prefix_cost": "24.16",
            "data_read_per_join": "2K"
          },
          "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": 23,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "5.75",
            "eval_cost": "2.30",
            "prefix_cost": "32.21",
            "data_read_per_join": "8K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      }
    ]
  }
}