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SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 10125 
ORDER BY 
  exception_id

Query time 0.00028

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	7	Using where; Using filesort

Result

exception_id	product_id	combination
2811	10125	a:2:{i:908;s:5:"18134";i:926;s:2:"-1";}
2812	10125	a:2:{i:908;s:5:"18134";i:926;s:2:"-2";}
2813	10125	a:2:{i:908;s:2:"-1";i:926;s:5:"18178";}
2814	10125	a:2:{i:908;s:2:"-1";i:926;s:5:"18174";}
2815	10125	a:2:{i:908;s:2:"-1";i:926;s:5:"18179";}
2816	10125	a:2:{i:908;s:2:"-1";i:926;s:5:"18183";}
2832	10125	a:2:{i:908;s:2:"-1";i:926;s:5:"18184";}