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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 (788) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00089

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "28.00"
    },
    "ordering_operation": {
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "a",
            "access_type": "ref",
            "possible_keys": [
              "status",
              "option_id",
              "option_id_2"
            ],
            "key": "option_id",
            "used_key_parts": [
              "option_id",
              "status"
            ],
            "key_length": "6",
            "ref": [
              "const",
              "const"
            ],
            "rows_examined_per_scan": 40,
            "rows_produced_per_join": 40,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "10.00",
              "eval_cost": "4.00",
              "prefix_cost": "14.00",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "variant_id",
              "option_id",
              "position",
              "modifier",
              "modifier_type",
              "weight_modifier",
              "weight_modifier_type",
              "point_modifier",
              "point_modifier_type",
              "status",
              "note_required"
            ]
          }
        },
        {
          "table": {
            "table_name": "b",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "cscartdb.a.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 40,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "10.00",
              "eval_cost": "4.00",
              "prefix_cost": "28.00",
              "data_read_per_join": "30K"
            },
            "used_columns": [
              "variant_id",
              "lang_code",
              "variant_name"
            ]
          }
        }
      ]
    }
  }
}

Result

variant_name	variant_id	option_id	position	modifier_type	weight_modifier_type	point_modifier_type	status
NO DISC	16018	788	1	A	A	A	A
A	16019	788	2	A	A	A	A
B	16020	788	3	A	A	A	A
C	16021	788	4	A	A	A	A
D	16022	788	5	A	A	A	A
E	16023	788	6	A	A	A	A
F	16024	788	7	A	A	A	A
G	16025	788	8	A	A	A	A
H	16026	788	9	A	A	A	A
I	16027	788	10	A	A	A	A
J	16028	788	11	A	A	A	A
K	16029	788	12	A	A	A	A
L	16030	788	13	A	A	A	A
M	16031	788	14	A	A	A	A
N	16032	788	15	A	A	A	A
O	16033	788	16	A	A	A	A
P	16034	788	17	A	A	A	A
Q	16035	788	18	A	A	A	A
R	16036	788	19	A	A	A	A
S	16037	788	20	A	A	A	A
T	16038	788	21	A	A	A	A
U	16039	788	22	A	A	A	A
V	16040	788	23	A	A	A	A
W	16041	788	24	A	A	A	A
X	16042	788	25	A	A	A	A
Y	16043	788	26	A	A	A	A
Z	16044	788	27	A	A	A	A
OTHER-4 CHARACTERS MAX	16045	788	28	A	A	A	A