SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9586a7459bbc87788db199a3c83c2f11de4c978a859856b571c8efb4c744701' 
  AND token = 'FJ+o4Enq6Q4O0V4/znJ1mYOx1ldbL9s+LSflNg1BtME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

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