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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 (
    70084, 70241, 69715, 69714, 69713, 69712, 
    69711, 69710, 69709, 69708, 69707, 
    69706, 69961, 70081, 70007, 69611, 
    69609, 69608, 69988, 69563
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00089

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	139640	69563	1	0.000	A	A	A	A
MP3	139730	69608	1	0.000	A	A	A	A
MP3	139732	69609	1	0.000	A	A	A	A
MP3	139736	69611	1	0.000	A	A	A	A
MP3	139926	69706	1	0.000	A	A	A	A
MP3	139928	69707	1	0.000	A	A	A	A
MP3	139930	69708	1	0.000	A	A	A	A
MP3	139932	69709	1	0.000	A	A	A	A
MP3	139934	69710	1	0.000	A	A	A	A
MP3	139936	69711	1	0.000	A	A	A	A
MP3	139938	69712	1	0.000	A	A	A	A
MP3	139940	69713	1	0.000	A	A	A	A
MP3	139942	69714	1	0.000	A	A	A	A
MP3	139944	69715	1	0.000	A	A	A	A
MP3	140436	69961	1	0.000	A	A	A	A
MP3	140490	69988	1	0.000	A	A	A	A
MP3	140528	70007	1	0.000	A	A	A	A
MP3	140676	70081	1	0.000	A	A	A	A
MP3	140682	70084	1	0.000	A	A	A	A
MP3	140996	70241	1	0.000	A	A	A	A
WAV	139641	69563	2	0.300	A	A	A	A
WAV	139731	69608	2	0.300	A	A	A	A
WAV	139733	69609	2	0.300	A	A	A	A
WAV	139737	69611	2	0.300	A	A	A	A
WAV	139927	69706	2	0.300	A	A	A	A
WAV	139929	69707	2	0.300	A	A	A	A
WAV	139931	69708	2	0.300	A	A	A	A
WAV	139933	69709	2	0.300	A	A	A	A
WAV	139935	69710	2	0.300	A	A	A	A
WAV	139937	69711	2	0.300	A	A	A	A
WAV	139939	69712	2	0.300	A	A	A	A
WAV	139941	69713	2	0.300	A	A	A	A
WAV	139943	69714	2	0.300	A	A	A	A
WAV	139945	69715	2	0.300	A	A	A	A
WAV	140437	69961	2	0.300	A	A	A	A
WAV	140491	69988	2	0.300	A	A	A	A
WAV	140529	70007	2	0.300	A	A	A	A
WAV	140677	70081	2	0.300	A	A	A	A
WAV	140683	70084	2	0.300	A	A	A	A
WAV	140997	70241	2	0.300	A	A	A	A