SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '466ce516573227f7ae8110f0370167550b3f805d5441143d3f4688cb5d09cc47' 
  AND token = 'y2H1H7+I4GlzRRnMry/6urg53JOIBPBJ37FtF6c4MIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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