token.rb

class Token
  include ActiveModel::Model
  attr_accessor :email

  validate :ensure_effective_token

  def initialize(token, email, expire_at)
    @token, @email, @expire_at = token, email, expire_at
  end

  def self.create(token)
     verifier = Rails.application.message_verifier(:password_reset).verify(token)
    new(token, *verifier)
  end

  def to_s
    @token
  end

  private

  def ensure_effective_token
    errors.add :base, 'This token is expired.' unless Time.zone.now < @expire_at
  end
end