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 (
    822, 662, 806, 805, 804, 803, 802, 801, 
    800, 799, 796, 792, 786, 782, 744, 743, 
    742, 741, 727, 720, 718, 716, 713, 701, 
    671, 670, 664, 663, 658, 657, 656, 377, 
    371, 369, 368, 362, 228, 195, 192, 189, 
    71, 10, 9
  )

Query time 0.00106

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "49.71"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "ALL",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "rows_examined_per_scan": 190,
          "rows_produced_per_join": 42,
          "filtered": "22.63",
          "cost_info": {
            "read_cost": "15.32",
            "eval_cost": "4.30",
            "prefix_cost": "19.62",
            "data_read_per_join": "687"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ],
          "attached_condition": "(`betaatif_store`.`p`.`product_id` in (822,662,806,805,804,803,802,801,800,799,796,792,786,782,744,743,742,741,727,720,718,716,713,701,671,670,664,663,658,657,656,377,371,369,368,362,228,195,192,189,71,10,9))"
        }
      },
      {
        "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": [
            "betaatif_store.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 42,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "10.75",
            "eval_cost": "4.30",
            "prefix_cost": "34.67",
            "data_read_per_join": "4K"
          },
          "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": [
            "betaatif_store.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 42,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "10.75",
            "eval_cost": "4.30",
            "prefix_cost": "49.72",
            "data_read_per_join": "16K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      }
    ]
  }
}