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

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.00"
    },
    "table": {
      "table_name": "companies",
      "access_type": "system",
      "possible_keys": [
        "PRIMARY"
      ],
      "rows_examined_per_scan": 1,
      "rows_produced_per_join": 1,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "0.00",
        "eval_cost": "0.10",
        "prefix_cost": "0.00",
        "data_read_per_join": "5K"
      },
      "used_columns": [
        "company_id",
        "status",
        "company",
        "lang_code",
        "address",
        "city",
        "state",
        "country",
        "zipcode",
        "email",
        "phone",
        "fax",
        "url",
        "storefront",
        "secure_storefront",
        "entry_page",
        "redirect_customer",
        "countries_list",
        "timestamp",
        "shippings",
        "logos",
        "request_user_id",
        "request_account_name",
        "request_account_data"
      ]
    }
  }
}

Result