SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a48eb339aea3b596675766265b38b1748dd2b6557b02d267ead55467ed750161' 
  AND token = 'ofPX3yiyFVUyDdYpgW+HmnGKYqFC6HJSw+w7JuO+qpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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