Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09d39c18191545d5cee15f3e98f1e3e0b346f483431101703a7e93859cd54365' 
  AND token = 'uaVerJPVOuiSfzqiSbQGFDhEnm6uSDiKe1SWbl4r8e4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}