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SELECT 
  c.product_id AS cur_product_id, 
  a.*, 
  b.option_name, 
  b.option_text, 
  b.description, 
  b.inner_hint, 
  b.incorrect_message, 
  b.comment 
FROM 
  cscart_product_options as a 
  LEFT JOIN cscart_product_options_descriptions as b ON a.option_id = b.option_id 
  AND b.lang_code = 'en' 
  LEFT JOIN cscart_product_global_option_links as c ON c.option_id = a.option_id 
WHERE 
  c.product_id IN (504) 
  AND a.product_id = 0 
  AND status = 'A' 
ORDER BY 
  a.position

Query time 0.00065

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	c	ref	PRIMARY,product_id	product_id	3	const	1	Using temporary; Using filesort
1	SIMPLE	a	eq_ref	PRIMARY,c_status	PRIMARY	3	mahm3t_cs443.c.option_id	1	Using where
1	SIMPLE	b	eq_ref	PRIMARY	PRIMARY	9	mahm3t_cs443.c.option_id,const	1	Using where