In the Text tab you can look for <0017> and find the tables in the active document (or selected story).

But it's not possible to look for tables using the GREP tab. Looking for \x{0017} or \x17 doesn't match anything.

Step to reproduce:
1. Create a new document, place a text frame, and add a table.
2. Open the Find/Change window, activate the GREP tab.
3. Run this GREP query: \x{0017}
4. Then try this one: \x17

Expected result: both queries found the table.

Actual result: InDesign reports that nothing was found.