SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd9dd88f0761d98ab74a45f74abe1e733c43e0e9f69a7a44aa4d322fde1e3fff' 
  AND token = '+sye3n+K2vv86JhCyMpaDIgncSmjNYN2B1E4hT9JQsE=' 
  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