How to make custom "expire_date"

my english not good.
my capture: 10.01.2020 17:59:38

if under 11.11.2021 custom

BLOCK:ConstantString
  value = "10.01.2020 17:59:38"
  => VAR @expiration
ENDBLOCK

BLOCK:DateToUnixTime
  datetime = @expiration
  format = "dd.MM.yyyy HH:mm:ss"
  => VAR @expirationUnix
ENDBLOCK

BLOCK:CurrentUnixTime
  useUtc = True
  => VAR @currentUnix
ENDBLOCK

BLOCK:Keycheck
  banIfNoMatch = False
  KEYCHAIN CUSTOM OR
    INTKEY @expirationUnix LessThan @currentUnix
ENDBLOCK
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