Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_64 (play_offs INTEGER, club VARCHAR, total VARCHAR)

### Question ###
What is the highest play-offs that have stevenage borough as the club, and a total greater than 21?

### Accurate SQL ###

SELECT MAX(play_offs) FROM table_name_64 WHERE club = "stevenage borough" AND total > 21