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SELECT 
  b.variant_name, 
  a.*, 
  IF(
    shared_option_variants.variant_id IS NOT NULL, 
    shared_option_variants.modifier, 
    a.modifier
  ) as modifier, 
  IF(
    shared_option_variants.variant_id IS NOT NULL, 
    shared_option_variants.modifier_type, 
    a.modifier_type
  ) as modifier_type 
FROM 
  cscart_product_option_variants AS a 
  LEFT JOIN cscart_product_option_variants_descriptions AS b ON b.variant_id = a.variant_id 
  AND b.lang_code = 'en' 
  LEFT JOIN cscart_ult_product_option_variants shared_option_variants ON shared_option_variants.variant_id = a.variant_id 
  AND shared_option_variants.company_id = 1 
WHERE 
  1 
  AND a.option_id IN (
    81520, 81518, 81381, 81258, 81014, 81275, 
    82086, 82084, 81290, 83079, 81509, 
    81575, 81574, 81572, 81569, 81567, 
    81566, 81475, 81474, 81473
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00099

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	a	range	status,option_id,option_id_2	option_id	6		40	Using index condition; Using filesort
1	SIMPLE	b	eq_ref	PRIMARY	PRIMARY	9	toolboxdigitalshop_dev.a.variant_id,const	1	Using where
1	SIMPLE	shared_option_variants	eq_ref	PRIMARY,company_id	PRIMARY	7	toolboxdigitalshop_dev.a.variant_id,const	1

Result

variant_name	variant_id	option_id	position	modifier	modifier_type	weight_modifier_type	point_modifier_type	status
MP3	162564	81014	1	0.000	A	A	A	A
MP3	163052	81258	1	0.000	A	A	A	A
MP3	163086	81275	1	0.000	A	A	A	A
MP3	163116	81290	1	0.000	A	A	A	A
MP3	163298	81381	1	0.000	A	A	A	A
MP3	163482	81473	1	0.000	A	A	A	A
MP3	163484	81474	1	0.000	A	A	A	A
MP3	163486	81475	1	0.000	A	A	A	A
MP3	163554	81509	1	0.000	A	A	A	A
MP3	163572	81518	1	0.000	A	A	A	A
MP3	163576	81520	1	0.000	A	A	A	A
MP3	163668	81566	1	0.000	A	A	A	A
MP3	163670	81567	1	0.000	A	A	A	A
MP3	163674	81569	1	0.000	A	A	A	A
MP3	163680	81572	1	0.000	A	A	A	A
MP3	163684	81574	1	0.000	A	A	A	A
MP3	163686	81575	1	0.000	A	A	A	A
MP3	164704	82084	1	0.000	A	A	A	A
MP3	164708	82086	1	0.000	A	A	A	A
MP3	166694	83079	1	0.000	A	A	A	A
WAV	162565	81014	2	0.300	A	A	A	A
WAV	163053	81258	2	0.300	A	A	A	A
WAV	163087	81275	2	0.300	A	A	A	A
WAV	163117	81290	2	0.300	A	A	A	A
WAV	163299	81381	2	0.300	A	A	A	A
WAV	163483	81473	2	0.300	A	A	A	A
WAV	163485	81474	2	0.300	A	A	A	A
WAV	163487	81475	2	0.300	A	A	A	A
WAV	163555	81509	2	0.300	A	A	A	A
WAV	163573	81518	2	0.300	A	A	A	A
WAV	163577	81520	2	0.300	A	A	A	A
WAV	163669	81566	2	0.300	A	A	A	A
WAV	163671	81567	2	0.300	A	A	A	A
WAV	163675	81569	2	0.300	A	A	A	A
WAV	163681	81572	2	0.300	A	A	A	A
WAV	163685	81574	2	0.300	A	A	A	A
WAV	163687	81575	2	0.300	A	A	A	A
WAV	164705	82084	2	0.300	A	A	A	A
WAV	164709	82086	2	0.300	A	A	A	A
WAV	166695	83079	2	0.300	A	A	A	A