SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f160a54c54bbf16b8a8aafd46ad4ef2a3410e309f8c86a7dfc2b7bf47ea7579e' 
  AND token = 'ijPZ4ZyKE0QWuucT/mF70jPXpAi3gORXNdpMdbSuzNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

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