UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = '/oGzQU1luC4razrD3X4jtdfdbgwRTJDoHYzeGNoV1dU=' 
WHERE 
  key_id = '68d0b47e5581f88be3a7b8375a194a5bb6547be3b8c86b875f00fdd0008947cf' 
  AND (
    token = '/oGzQU1luC4razrD3X4jtdfdbgwRTJDoHYzeGNoV1dU=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )

Query time 0.00030