SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 339800 
ORDER BY 
  exception_id

Query time 0.00113

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.20"
    },
    "ordering_operation": {
      "using_filesort": false,
      "table": {
        "table_name": "cscart_product_options_exceptions",
        "access_type": "ref",
        "possible_keys": [
          "product"
        ],
        "key": "product",
        "used_key_parts": [
          "product_id"
        ],
        "key_length": "3",
        "ref": [
          "const"
        ],
        "rows_examined_per_scan": 1,
        "rows_produced_per_join": 1,
        "filtered": "100.00",
        "index_condition": "(`webmarco`.`cscart_product_options_exceptions`.`product_id` <=> 339800)",
        "cost_info": {
          "read_cost": "1.00",
          "eval_cost": "0.20",
          "prefix_cost": "1.20",
          "data_read_per_join": "24"
        },
        "used_columns": [
          "exception_id",
          "product_id",
          "combination"
        ]
      }
    }
  }
}