DELETE FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b891a3f1ae250860ca0ddd59101687b523979def02bcd4f3fb2c1fcf7991f174' 
  AND token = 'QQy4w4e+vJwZKCryOp4XlSvD+al/OR6e+y44ItxY170='

Query time 0.00038