SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e6289366f42bcbbcb1fdef73aff464d522e908407496821247fb1996cd571fa' 
  AND token = 'vShfZz/Iwsv0P+izg3CWKssbyl+Mw/UkgpftkD7VmKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables