i need a way to find all the workflow instances that contain Invalid in the Value Column of the Tokens tab like below.  

I understand there is not a way through the UI to search across instances of the workflow for this information.

Is there a SQL query I can write to get this information.  I thought perhaps searching in LFWF].[dbo].[search_message] but that doesn't seem to have enough records. and i need a way of getting back to the workflow instance or business process variables that were also used in that workflow instance.

Any pointers would be much appreciated