[{"validated_at":null,"shouldBeReturned":true},{"validated_at":2,"shouldBeReturned":false},{"validated_at":null,"archived_at":null,"shouldBeReturned":true},{"validated_at":3,"shouldBeReturned":false},{"validated_at":5,"archived_at":null,"shouldBeReturned":false}]

db.collection.find({validated_at:null,archived_at:null})