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 (
    51497, 51498, 51496, 105, 126, 115, 11, 
    81, 56, 135, 82, 116, 117, 106, 17, 57, 
    122, 58, 5, 22, 18, 27, 119, 121, 23, 141, 
    4, 142, 120, 62, 108, 107
  )

Query time 0.00084

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "45.96"
    },
    "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": 33,
          "rows_produced_per_join": 33,
          "filtered": "100.00",
          "index_condition": "(`test_uchur_k`.`p`.`product_id` in (51497,51498,51496,105,126,115,11,81,56,135,82,116,117,106,17,57,122,58,5,22,18,27,119,121,23,141,4,142,120,62,108,107))",
          "cost_info": {
            "read_cost": "19.56",
            "eval_cost": "3.30",
            "prefix_cost": "22.86",
            "data_read_per_join": "528"
          },
          "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": 33,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "8.25",
            "eval_cost": "3.30",
            "prefix_cost": "34.41",
            "data_read_per_join": "3K"
          },
          "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": 33,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "8.25",
            "eval_cost": "3.30",
            "prefix_cost": "45.96",
            "data_read_per_join": "12K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      }
    ]
  }
}