UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'Gna6tte9/U0ean5gbaGoebiW8tDC6viWYSJfySnI5/8=' 
WHERE 
  key_id = 'a8ad9847625457774eaf38b8a4c38e525a373a1453f6df6a1fb6862e809e65d3' 
  AND (
    token = 'Gna6tte9/U0ean5gbaGoebiW8tDC6viWYSJfySnI5/8=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )

Query time 0.00046