SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d690c35d4459df4c5cf08188672ab089000d9564b4e290e9384c5e430dc932a' 
  AND token = 'RMm+7ZgM3xZHmdSyLIswdvvW5iwqTwf8DMtiSkEBwj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

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