UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'vJeV2d+5+JauMCBDrcChvBqY2HmtNjO5U4peDwpydek=' 
WHERE 
  key_id = '50b85cb59f54cdb5aa9cbef9317b9923843eaca1a0840e381eb256e0e506165c' 
  AND (
    token = 'vJeV2d+5+JauMCBDrcChvBqY2HmtNjO5U4peDwpydek=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )