Binary geometry function st_intersects given two geometries of different srids: 1 and 0, which should have been identical.

select ST_SRID(boundary_polygon) from boundaries;

ogr2ogr -f "MYSQL" MYSQL:"blahdb,host=localhost,user=blah,password=blah,port=3306" boundaries.tab

UPDATE boundaries SET boundary_polygon = GeomFromWKB(boundary_polygon, 0);