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 (
    1055, 1056, 1057, 1058, 1050, 1051, 1052, 
    1049, 1067, 1033, 1034, 1037, 1035, 
    1036, 1038, 1032, 1062, 1061, 1060, 
    1063, 1059, 1064, 1066, 1040, 1072, 
    1054, 1053, 1070, 1044, 1039, 1071, 
    1041, 1042, 1065, 1043, 1047, 1048, 
    1069, 1031, 1046, 1045, 1068
  )

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "174.26"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "ALL",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "rows_examined_per_scan": 353,
          "rows_produced_per_join": 41,
          "filtered": "11.90",
          "cost_info": {
            "read_cost": "65.06",
            "eval_cost": "8.40",
            "prefix_cost": "73.46",
            "data_read_per_join": "671"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ],
          "attached_condition": "(`cscart`.`p`.`product_id` in (1055,1056,1057,1058,1050,1051,1052,1049,1067,1033,1034,1037,1035,1036,1038,1032,1062,1061,1060,1063,1059,1064,1066,1040,1072,1054,1053,1070,1044,1039,1071,1041,1042,1065,1043,1047,1048,1069,1031,1046,1045,1068))"
        }
      },
      {
        "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": [
            "cscart.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 41,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "42.00",
            "eval_cost": "8.40",
            "prefix_cost": "123.86",
            "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": [
            "cscart.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 41,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "42.00",
            "eval_cost": "8.40",
            "prefix_cost": "174.26",
            "data_read_per_join": "16K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      }
    ]
  }
}