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SELECT 
  b.variant_name, 
  a.* 
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' 
WHERE 
  1 
  AND a.option_id IN (1278, 1279, 598, 599, 600) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00546

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "read_sorted_file": {
          "filesort": {
            "sort_key": "a.position, a.variant_id",
            "table": {
              "table_name": "a",
              "access_type": "range",
              "possible_keys": ["status", "option_id", "option_id_2"],
              "key": "option_id",
              "key_length": "6",
              "used_key_parts": ["option_id", "status"],
              "rows": 49,
              "filtered": 100,
              "index_condition": "a.option_id in (1278,1279,598,599,600) and a.`status` = 'A'"
            }
          }
        }
      },
      {
        "table": {
          "table_name": "b",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["variant_id", "lang_code"],
          "ref": ["dev_db.a.variant_id", "const"],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "trigcond(b.lang_code = 'en')"
        }
      }
    ]
  }
}

Result

variant_name	variant_id	option_id	position	modifier_type	weight_modifier_type	point_modifier_type	status
Lemongrass	900	598	1	A	A	A	A
Lemongrass	901	599	1	A	A	A	A
Lemongrass	902	600	1	A	A	A	A
The Slumber	3396	1278	1	A	A	A	A
The Slumber	3404	1279	1	A	A	A	A
Stevia	1125	598	2	A	A	A	A
Stevia	1135	599	2	A	A	A	A
Stevia	1145	600	2	A	A	A	A
The Mind	3397	1278	2	A	A	A	A
The Mind	3405	1279	2	A	A	A	A
Lemon verbena	1126	598	3	A	A	A	A
Lemon verbena	1136	599	3	A	A	A	A
Lemon verbena	1146	600	3	A	A	A	A
The Soul	3398	1278	3	A	A	A	A
The Soul	3406	1279	3	A	A	A	A
Catsear	1127	598	4	A	A	A	A
Catsear	1137	599	4	A	A	A	A
Catsear	1147	600	4	A	A	A	A
The Charm	3399	1278	4	A	A	A	A
The Charm	3407	1279	4	A	A	A	A
Butterfly pea	1128	598	5	A	A	A	A
Butterfly pea	1138	599	5	A	A	A	A
Butterfly pea	1148	600	5	A	A	A	A
The Dream	3400	1278	5	A	A	A	A
The Dream	3408	1279	5	A	A	A	A
Mint	1129	598	6	A	A	A	A
Mint	1139	599	6	A	A	A	A
Mint	1149	600	6	A	A	A	A
The Keenness	3401	1278	6	A	A	A	A
The Keenness	3409	1279	6	A	A	A	A
Hibiscus	1130	598	7	A	A	A	A
Hibiscus	1140	599	7	A	A	A	A
Hibiscus	1150	600	7	A	A	A	A
The Journey	3402	1278	7	A	A	A	A
The Home	3410	1279	7	A	A	A	A
Rosemary	1131	598	8	A	A	A	A
Rosemary	1141	599	8	A	A	A	A
Rosemary	1151	600	8	A	A	A	A
The Home	3403	1278	8	A	A	A	A
The Journey	3411	1279	8	A	A	A	A
Jasmine	1132	598	9	A	A	A	A
Jasmine	1142	599	9	A	A	A	A
Jasmine	1152	600	9	A	A	A	A
Rose	1133	598	10	A	A	A	A
Rose	1143	599	10	A	A	A	A
Rose	1153	600	10	A	A	A	A
Chamomile	1134	598	11	A	A	A	A
Chamomile	1144	599	11	A	A	A	A
Chamomile	1154	600	11	A	A	A	A