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 = 2 
WHERE 
  a.option_id IN (1314, 1303, 1304) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00077

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 6 133 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
23902 1314 10 0.000 A 0.000 A Standard
23903 1314 20 0.000 A 0.000 A Thermo (additional thermal insulation)
23726 1303 100 0.000 A 0.000 A EZV-A for tiled coverings (up to 45mm height)
23927 1303 105 0.000 A 0.000 A EHV-AT for tiled coverings (up to 90mm height)
23725 1303 110 0.000 A 0.000 A ESV for roofing felt, bitumen shingles up to 10mm (2x5mm)
24011 1303 115 0.000 A 0.000 A ESV-T for roofing felt, bitumen shingles up to 10mm (2x5mm)
23727 1303 130 0.000 A 0.000 A EZV-F for flat tiles
24012 1303 135 0.000 A 0.000 A EZV-FT for flat tiles
23728 1303 140 0.000 A 0.000 A ELV for flat bitumen shingles, slates up to 10mm (2x5mm) height; individual side panels
24010 1303 145 0.000 A 0.000 A ELV-T for plain tile up to 10mm (2x5mm), 24÷32, 2x(12÷16) height
23729 1303 150 0.000 A 0.000 A EBV-P for panel sheet with standing seam
24013 1303 155 0.000 A 0.000 A EBV-PT for panel sheet with standing seam
23730 1304 507 0.000 A 0.000 A 55x78 cm
23731 1304 509 0.000 A 0.000 A 55x98 cm
23732 1304 511 0.000 A 0.000 A 55x118 cm
23733 1304 609 0.000 A 0.000 A 66x98 cm
23734 1304 611 0.000 A 0.000 A 66x118 cm
23735 1304 614 0.000 A 0.000 A 66x140 cm
23736 1304 709 0.000 A 0.000 A 78x98 cm
23737 1304 711 0.000 A 0.000 A 78x118 cm
23738 1304 714 0.000 A 0.000 A 78x140 cm
23739 1304 716 0.000 A 0.000 A 78x160 cm
23740 1304 718 0.000 A 0.000 A 78x180 cm
23741 1304 720 0.000 A 0.000 A 78x206 cm
23742 1304 911 0.000 A 0.000 A 94x118 cm
23743 1304 914 0.000 A 0.000 A 94x140 cm
23744 1304 916 0.000 A 0.000 A 94x160 cm
23745 1304 918 0.000 A 0.000 A 94x180 cm
23746 1304 920 0.000 A 0.000 A 94x206 cm
23747 1304 1111 0.000 A 0.000 A 114x118 cm
23748 1304 1114 0.000 A 0.000 A 114x140 cm
23749 1304 1309 0.000 A 0.000 A 134x98 cm