UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'YNuTiMwTxbIElS9sgumhvgaF+DGBW4ycBNWnTve1jls=' 
WHERE 
  key_id = '5c83d813c1f792467a470735620ac8aa6ea2e1e8480f1373363760be714deb03' 
  AND (
    token = 'YNuTiMwTxbIElS9sgumhvgaF+DGBW4ycBNWnTve1jls=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )