Notification.cls

public class Notification{
   /**
   * @description  : 
   * @param    jobName                Name of the scheduler
   * @param    durationInMinutes      Greater duration than the time interval between scheduler executions.
   */
    public static void addNotificationFor(String jobName, Integer durationInMinutes){
      Notification__c notification = new Notification__c(
        Name = jobName,
        External_Code__c = jobName,
        Notify__c = false         
      ); 
      upsert notification External_Code__c;
      //This makes sure that it will meet the criteria to send email
      notification.Notify__c = true;
      notification.Notify_After_One_Hour_Of_This_Time__c = System.Now().addHours(-1).addMinutes(durationInMinutes);
      notification.Last_Run__c = System.now();
      update notification;             
    }  
  
}