This is just a test for injection. If an attacker can see xQs in the output then they’ll know injection is possible.
There is no “risk” from this particular query.
A developer should pay no attention to whatever injection mechanisms, formats or meanings – these are none of his business.
There is only one cause for for all the infinite number of injections – an improperly formatted query. As long as your queries are properly formatted then SQL injections are not possible. Focus on your queries rather than methods of SQL injection.