SELECT 
  a.variant_id, 
  a.option_id, 
  a.position, 
  a.modifier, 
  a.modifier_type, 
  a.weight_modifier, 
  a.weight_modifier_type, 
  b.variant_name, 
  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 a.variant_id = b.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 
  a.option_id IN (162, 254, 908, 926) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00061

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 12 Using index condition; Using filesort
1 SIMPLE b eq_ref PRIMARY PRIMARY 9 mahm3t_cs443.a.variant_id,const 1 Using where
1 SIMPLE shared_option_variants eq_ref PRIMARY,company_id PRIMARY 7 mahm3t_cs443.a.variant_id,const 1

Result

variant_id option_id position modifier modifier_type weight_modifier weight_modifier_type variant_name
4033 162 10 0.000 A 0.000 A weiß
7077 254 10 0.000 A 0.000 A White
18133 908 10 0.000 A 0.000 A Straight
18169 926 10 0.000 A 0.000 A White
7078 254 20 0.000 A 0.000 A Winchester
22146 162 20 0.000 A 0.000 A Winchester
4035 162 30 0.000 A 0.000 A Golden Oak
7079 254 30 0.000 A 0.000 A Golden Oak
18134 908 30 0.000 A 0.000 A Half-rounded
18171 926 30 0.000 A 0.000 A Winchester
4037 162 50 0.000 A 0.000 A Nußbaum
7081 254 50 0.000 A 0.000 A Nußbaum
18172 926 50 0.000 A 0.000 A Golden oak
4038 162 60 0.000 A 0.000 A Mahagoni
7082 254 60 0.000 A 0.000 A Mahagoni
7083 254 70 0.000 A 0.000 A Anthrazit
18173 926 70 0.000 A 0.000 A Walnut
22147 162 70 0.000 A 0.000 A Dark grey
18174 926 90 0.000 A 0.000 A Swamp oak
18176 926 180 0.000 A 0.000 A Anthracite (smooth)
18183 926 190 0.000 A 0.000 A Metallic anthracite (brushed)