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SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 10012 
ORDER BY 
  exception_id

Query time 0.00024

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	5	Using where; Using filesort

Result

exception_id	product_id	combination
860	10012	a:2:{i:535;s:2:"-1";i:622;s:5:"15238";}
861	10012	a:2:{i:535;s:2:"-1";i:622;s:5:"15237";}
2857	10012	a:2:{i:535;s:2:"-1";i:622;s:5:"15155";}
2858	10012	a:2:{i:535;s:2:"-1";i:622;s:5:"15158";}
2859	10012	a:2:{i:535;s:2:"-1";i:622;s:5:"15157";}