SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32576be4562e040cfb622755ab253b613dac62fe2e8154315e3255f634b62590' 
  AND token = 'p3a/cDrPF0E3bXofV2kzCP32t4MncFdN1lCECDX1kg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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