Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35ba116492f89a1d52fdc567dda25bb602e1a0712cdbedd3651eeffd15be6289' 
  AND token = 'hHPSGAxmJxuJhGjO10wuhrJjxx7r5JZ+C5mu8o22Oyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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