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_20 (grid INTEGER, constructor VARCHAR, laps VARCHAR)

### Question ###
What is the low grid that has brm and over 54 laps?

### Accurate SQL ###

SELECT MIN(grid) FROM table_name_20 WHERE constructor = "brm" AND laps > 54