SELECT 
  `dispatch`, 
  `value` 
FROM 
  cscart_ab__emd_settings 
WHERE 
  company_id = 1 
  AND lang_code = 'ru'

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_ab__emd_settings",
          "access_type": "ALL",
          "rows": 10,
          "filtered": 100,
          "attached_condition": "cscart_ab__emd_settings.company_id = 1 and cscart_ab__emd_settings.lang_code = 'ru'"
        }
      }
    ]
  }
}