SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b4098a408d714dc273df681a7c7a9d274b2f8b8e069134db4b9ba40a55ca103' 
  AND token = 'CQw009ZEYev4pPXQHdNd5MpmWiW3FJuP40abA+Jqo1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

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