Check for table lock in conditional statement

How can I make this work?

IF( EXISTS (SHOW OPEN TABLES WHERE In_use < 2 and `Database` like 'MYDB' ) ) THEN
 -- DO SOMETHING
END IF

Context

I want to run some sql statements inside a procedure, only if the table x is not locked ( because of updates or any other reason ).

I want to do this on the MySQL server side as I have clients that trigger this procedure from more than 12 machines from bash, c and c#.

So is there any way to get the table lock information in a conditional statement on the server side ?