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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 (
    70479, 70478, 70420, 70086, 69876, 70334, 
    70333, 70332, 70331, 70330, 70329, 
    70328, 70327, 70326, 70325, 70324, 
    70323, 69843, 69840, 69839
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00101

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	140192	69839	1	0.000	A	A	A	A
MP3	140194	69840	1	0.000	A	A	A	A
MP3	140200	69843	1	0.000	A	A	A	A
MP3	140266	69876	1	0.000	A	A	A	A
MP3	140686	70086	1	0.000	A	A	A	A
MP3	141160	70323	1	0.000	A	A	A	A
MP3	141162	70324	1	0.000	A	A	A	A
MP3	141164	70325	1	0.000	A	A	A	A
MP3	141166	70326	1	0.000	A	A	A	A
MP3	141168	70327	1	0.000	A	A	A	A
MP3	141170	70328	1	0.000	A	A	A	A
MP3	141172	70329	1	0.000	A	A	A	A
MP3	141174	70330	1	0.000	A	A	A	A
MP3	141176	70331	1	0.000	A	A	A	A
MP3	141178	70332	1	0.000	A	A	A	A
MP3	141180	70333	1	0.000	A	A	A	A
MP3	141182	70334	1	0.000	A	A	A	A
MP3	141354	70420	1	0.000	A	A	A	A
MP3	141470	70478	1	0.000	A	A	A	A
MP3	141472	70479	1	0.000	A	A	A	A
WAV	140193	69839	2	0.300	A	A	A	A
WAV	140195	69840	2	0.300	A	A	A	A
WAV	140201	69843	2	0.300	A	A	A	A
WAV	140267	69876	2	0.300	A	A	A	A
WAV	140687	70086	2	0.300	A	A	A	A
WAV	141161	70323	2	0.300	A	A	A	A
WAV	141163	70324	2	0.300	A	A	A	A
WAV	141165	70325	2	0.300	A	A	A	A
WAV	141167	70326	2	0.300	A	A	A	A
WAV	141169	70327	2	0.300	A	A	A	A
WAV	141171	70328	2	0.300	A	A	A	A
WAV	141173	70329	2	0.300	A	A	A	A
WAV	141175	70330	2	0.300	A	A	A	A
WAV	141177	70331	2	0.300	A	A	A	A
WAV	141179	70332	2	0.300	A	A	A	A
WAV	141181	70333	2	0.300	A	A	A	A
WAV	141183	70334	2	0.300	A	A	A	A
WAV	141355	70420	2	0.300	A	A	A	A
WAV	141471	70478	2	0.300	A	A	A	A
WAV	141473	70479	2	0.300	A	A	A	A