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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 (
    81431, 81430, 81429, 81273, 81272, 81270, 
    81269, 81268, 81267, 81266, 81265, 
    81264, 81263, 81527, 81526, 81525, 
    81524, 81523, 81522, 81521
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00095

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	163062	81263	1	0.000	A	A	A	A
MP3	163064	81264	1	0.000	A	A	A	A
MP3	163066	81265	1	0.000	A	A	A	A
MP3	163068	81266	1	0.000	A	A	A	A
MP3	163070	81267	1	0.000	A	A	A	A
MP3	163072	81268	1	0.000	A	A	A	A
MP3	163074	81269	1	0.000	A	A	A	A
MP3	163076	81270	1	0.000	A	A	A	A
MP3	163080	81272	1	0.000	A	A	A	A
MP3	163082	81273	1	0.000	A	A	A	A
MP3	163394	81429	1	0.000	A	A	A	A
MP3	163396	81430	1	0.000	A	A	A	A
MP3	163398	81431	1	0.000	A	A	A	A
MP3	163578	81521	1	0.000	A	A	A	A
MP3	163580	81522	1	0.000	A	A	A	A
MP3	163582	81523	1	0.000	A	A	A	A
MP3	163584	81524	1	0.000	A	A	A	A
MP3	163586	81525	1	0.000	A	A	A	A
MP3	163588	81526	1	0.000	A	A	A	A
MP3	163590	81527	1	0.000	A	A	A	A
WAV	163063	81263	2	0.300	A	A	A	A
WAV	163065	81264	2	0.300	A	A	A	A
WAV	163067	81265	2	0.300	A	A	A	A
WAV	163069	81266	2	0.300	A	A	A	A
WAV	163071	81267	2	0.300	A	A	A	A
WAV	163073	81268	2	0.300	A	A	A	A
WAV	163075	81269	2	0.300	A	A	A	A
WAV	163077	81270	2	0.300	A	A	A	A
WAV	163081	81272	2	0.300	A	A	A	A
WAV	163083	81273	2	0.300	A	A	A	A
WAV	163395	81429	2	0.300	A	A	A	A
WAV	163397	81430	2	0.300	A	A	A	A
WAV	163399	81431	2	0.300	A	A	A	A
WAV	163579	81521	2	0.300	A	A	A	A
WAV	163581	81522	2	0.300	A	A	A	A
WAV	163583	81523	2	0.300	A	A	A	A
WAV	163585	81524	2	0.300	A	A	A	A
WAV	163587	81525	2	0.300	A	A	A	A
WAV	163589	81526	2	0.300	A	A	A	A
WAV	163591	81527	2	0.300	A	A	A	A