Hi xadoom86,
Thank you for your purchase.

Unfortunately we do not have that feature in our plugin build-in.
But I can suggest you some workaround.

Only case (for now) where Time with seconds  would work is to have MySQL table with data. Times will be displayed with seconds and sorting will work but editing from WP backed is not possible. You will have to edit this time values directly in database.

Steps you need to follow to achieve this:

Have to go in database, find table wp_options. In this table find wdtTimeFormat in option_name column and set h:i:s as option_value for this column.

After that you have to create new MySQL table where you will place data. This table will be called "time_table" in this example, and one of the column (or more then one it depends how much time columns do you need) will be TIME type:

Then when you created a table in database, you'll have to create wpDataTable based on time_table from database, and you can create it if you choose Add From Data Sourceand select MySQL table. Your query should be:

SELECT * FROM time_table

Like that you'll show time with second and will be able to sort it, but only way to edit data is directly from the database. Column type for this column should be Time in optional column setup.

Hope this can help.