SELECT 
  companies.* 
FROM 
  cscart_companies AS companies 
WHERE 
  companies.company_id = 1

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "companies",
      "access_type": "system",
      "possible_keys": ["PRIMARY"],
      "rows": 1,
      "filtered": 100
    }
  }
}