No lien provided for in this act shall bind any property subject thereto for a longer period than one year after the date on which the same is filed, unless proceedings be commenced in the district court within that time to enforce the same, or, if a credit be given, then one year after the expiration of such credit, but no such lien shall continue in force for a longer time than two years from the time the lien is filed by any agreement to give credit unless action to enforce the same shall have been commenced within that time.