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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 (
    81999, 81998, 81997, 81996, 81995, 81994, 
    82338, 82298, 83462, 83461, 83460, 
    82467, 82596, 81981, 81980, 83432, 
    82558, 81712, 82665, 82562
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00100

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	163960	81712	1	0.000	A	A	A	A
MP3	164496	81980	1	0.000	A	A	A	A
MP3	164498	81981	1	0.000	A	A	A	A
MP3	164524	81994	1	0.000	A	A	A	A
MP3	164526	81995	1	0.000	A	A	A	A
MP3	164528	81996	1	0.000	A	A	A	A
MP3	164530	81997	1	0.000	A	A	A	A
MP3	164532	81998	1	0.000	A	A	A	A
MP3	164534	81999	1	0.000	A	A	A	A
MP3	165132	82298	1	0.000	A	A	A	A
MP3	165212	82338	1	0.000	A	A	A	A
MP3	165470	82467	1	0.000	A	A	A	A
MP3	165652	82558	1	0.000	A	A	A	A
MP3	165660	82562	1	0.000	A	A	A	A
MP3	165728	82596	1	0.000	A	A	A	A
MP3	165866	82665	1	0.000	A	A	A	A
MP3	167400	83432	1	0.000	A	A	A	A
MP3	167456	83460	1	0.000	A	A	A	A
MP3	167458	83461	1	0.000	A	A	A	A
MP3	167460	83462	1	0.000	A	A	A	A
WAV	163961	81712	2	0.300	A	A	A	A
WAV	164497	81980	2	0.300	A	A	A	A
WAV	164499	81981	2	0.300	A	A	A	A
WAV	164525	81994	2	0.300	A	A	A	A
WAV	164527	81995	2	0.300	A	A	A	A
WAV	164529	81996	2	0.300	A	A	A	A
WAV	164531	81997	2	0.300	A	A	A	A
WAV	164533	81998	2	0.300	A	A	A	A
WAV	164535	81999	2	0.300	A	A	A	A
WAV	165133	82298	2	0.300	A	A	A	A
WAV	165213	82338	2	0.300	A	A	A	A
WAV	165471	82467	2	0.300	A	A	A	A
WAV	165653	82558	2	0.300	A	A	A	A
WAV	165661	82562	2	0.300	A	A	A	A
WAV	165729	82596	2	0.300	A	A	A	A
WAV	165867	82665	2	0.300	A	A	A	A
WAV	167401	83432	2	0.300	A	A	A	A
WAV	167457	83460	2	0.300	A	A	A	A
WAV	167459	83461	2	0.300	A	A	A	A
WAV	167461	83462	2	0.300	A	A	A	A