Create Member.expired scope.

app/models/member.rb

@@ -31,6 +31,7 @@ class Member < ActiveRecord::Base
   scope :non_invite, -> { where(invite_token: nil) }
   scope :request, -> { where.not(requested_at: nil) }
   scope :has_access, -> { where('access_level > 0') }
+  scope :expired, -> { where('expires_at <= ?', Time.current) }
   scope :guests, -> { where(access_level: GUEST) }
   scope :reporters, -> { where(access_level: REPORTER) }

app/workers/remove_expired_members_worker.rb

@@ -2,7 +2,7 @@ class RemoveExpiredMembersWorker
   include Sidekiq::Worker
   def perform
-    Member.where('expires_at <= ?', Time.current).find_each do |member|
+    Member.expired.find_each do |member|
       begin
         Members::AuthorizedDestroyService.new(member).execute
       rescue => ex