UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'M8stjGhwLJBtEm9wmsoYybj+EWPyoWmx1Je7gzWj3Rk=' 
WHERE 
  key_id = '1c56358a79394e63f9d4527b7e46eae27d18de2797a46b5761b1369494579071' 
  AND (
    token = 'M8stjGhwLJBtEm9wmsoYybj+EWPyoWmx1Je7gzWj3Rk=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )