SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 6811 
ORDER BY 
  exception_id

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "cscart_product_options_exceptions.exception_id",
        "table": {
          "table_name": "cscart_product_options_exceptions",
          "access_type": "ref",
          "possible_keys": ["product"],
          "key": "product",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "ref": ["const"],
          "rows": 4,
          "filtered": 100,
          "attached_condition": "cscart_product_options_exceptions.product_id <=> 6811"
        }
      }
    }
  }
}