I am trying to run this simple workflow and it just runs without end. At the same time a question mark shows up over the Input Data tool instead of the percent complete.
It doesn't know the percent because it's waiting for an API response from Salesforce. Have you authenticated before (ie are you sure that you are authenticating correctly). That's where I'd look first.
If this is a specialized SFDC odbc (ie not from Alteryx) - I'd recommend turning off AMP too. Alteryx uses a python based Salesforce Input tool which does require amp - it looks like your ODBC is in Lua - so it may not (and may be from a third party).