SELECT 
  * 
FROM 
  `cscart_users` 
WHERE 
  `company_id` = 692

Query time 0.00183

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "70.00"
    },
    "table": {
      "table_name": "cscart_users",
      "access_type": "ALL",
      "rows_examined_per_scan": 650,
      "rows_produced_per_join": 65,
      "filtered": "10.00",
      "cost_info": {
        "read_cost": "63.50",
        "eval_cost": "6.50",
        "prefix_cost": "70.00",
        "data_read_per_join": "701K"
      },
      "used_columns": [
        "user_id",
        "status",
        "user_type",
        "user_login",
        "referer",
        "is_root",
        "company_id",
        "last_login",
        "last_activity",
        "timestamp",
        "password",
        "salt",
        "firstname",
        "lastname",
        "company",
        "email",
        "phone",
        "fax",
        "url",
        "tax_exempt",
        "lang_code",
        "birthday",
        "purchase_timestamp_from",
        "purchase_timestamp_to",
        "responsible_email",
        "password_change_timestamp",
        "api_key",
        "helpdesk_user_id",
        "external_id",
        "access",
        "first_banner",
        "token",
        "crm_id_user",
        "inn",
        "ogrn",
        "dskey",
        "referral_code",
        "referral_id",
        "ga",
        "ym_uid",
        "utm",
        "file_place",
        "isEmailConfirmed",
        "isPhoneConfirmed",
        "opf",
        "check_status_time",
        "company_status_id",
        "not_resident",
        "isIndividualPerson"
      ],
      "attached_condition": "(`dev2`.`cscart_users`.`company_id` = 692)"
    }
  }
}