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SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 9859 
ORDER BY 
  exception_id

Query time 0.00035

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	cscart_product_options_exceptions	ref	product	product	3	const	6	Using where; Using filesort

Result

exception_id	product_id	combination
2839	9859	a:2:{i:908;s:5:"18134";i:926;s:2:"-1";}
2840	9859	a:2:{i:908;s:5:"18134";i:926;s:2:"-2";}
2841	9859	a:2:{i:908;s:2:"-1";i:926;s:5:"18177";}
2842	9859	a:2:{i:908;s:2:"-1";i:926;s:5:"18180";}
2843	9859	a:2:{i:908;s:2:"-1";i:926;s:5:"18181";}
2844	9859	a:2:{i:908;s:2:"-1";i:926;s:5:"18182";}