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SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 9945 
ORDER BY 
  exception_id

Query time 0.00027

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	9	Using where; Using filesort

Result

exception_id	product_id	combination
338	9945	a:1:{i:599;s:5:"14922";}
339	9945	a:1:{i:599;s:5:"14923";}
340	9945	a:1:{i:599;s:5:"14924";}
341	9945	a:1:{i:599;s:5:"14925";}
342	9945	a:1:{i:599;s:5:"14927";}
343	9945	a:1:{i:599;s:5:"14929";}
344	9945	a:1:{i:599;s:5:"14930";}
345	9945	a:1:{i:599;s:5:"14931";}
346	9945	a:1:{i:599;s:5:"14939";}