UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'GYhU8WQas7GGQaqvjBKXSXQoXOlGcdhMGLz3cpDAgEk=' 
WHERE 
  key_id = '506303b2336e0714469ed6ad23d22a482c86d5a48d01b0290c6fbb962c1a8e3c' 
  AND (
    token = 'GYhU8WQas7GGQaqvjBKXSXQoXOlGcdhMGLz3cpDAgEk=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )

Query time 0.00028