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SELECT 
  a.code, 
  b.state 
FROM 
  cscart_states as a 
  LEFT JOIN cscart_state_descriptions as b ON b.state_id = a.state_id 
  AND b.lang_code = 'en' 
WHERE 
  a.country_code = 'IN' 
ORDER BY 
  b.state

Query time 0.01845

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "68.61"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "35.00"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "a",
            "access_type": "ref",
            "possible_keys": [
              "cs",
              "country_code"
            ],
            "key": "cs",
            "used_key_parts": [
              "country_code"
            ],
            "key_length": "8",
            "ref": [
              "const"
            ],
            "rows_examined_per_scan": 35,
            "rows_produced_per_join": 35,
            "filtered": "100.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "0.36",
              "eval_cost": "3.50",
              "prefix_cost": "3.86",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "state_id",
              "country_code",
              "code"
            ]
          }
        },
        {
          "table": {
            "table_name": "b",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "state_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "aerokidsshop.a.state_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 35,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "26.25",
              "eval_cost": "3.50",
              "prefix_cost": "33.61",
              "data_read_per_join": "26K"
            },
            "used_columns": [
              "state_id",
              "lang_code",
              "state"
            ]
          }
        }
      ]
    }
  }
}

Result

code	state
IN-AN	Andaman and Nicobar Islands
IN-AP	Andhra Pradesh
IN-AR	Arunachal Pradesh
IN-AS	Assam
IN-BR	Bihār
IN-CH	Chandigarh
IN-CT	Chhattisgarh
IN-DN	Dadar and Nagar Haveli
IN-DD	Daman and Diu
IN-DL	Delhi
IN-GA	Goa
IN-GJ	Gujarat
IN-HR	Haryana
IN-HP	Himachal Pradesh
IN-JK	Jammu and Kashmir
IN-JH	Jharkhand
IN-KA	Karnataka
IN-KL	Kerala
IN-LD	Lakshadweep
IN-MP	Madhya Pradesh
IN-MH	Maharashtra
IN-MN	Manipur
IN-ML	Meghalaya
IN-MZ	Mizoram
IN-NL	Nagaland
IN-OR	Orissa
IN-PY	Pondicherry
IN-PB	Punjab
IN-RJ	Rajasthan
IN-SK	Sikkim
IN-TN	Tamil Nadu
IN-TG	Telangana
IN-TR	Tripura
IN-UP	Uttar Pradesh
IN-WB	WEST BENGAL