SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '258b58011f25dc95a5e0d9e389f0d36b65d2d2452e8b33e332ee5d2c8dd72f9d' 
  AND token = 'abpPCmtFlp6uKrykTiPg0Pby12pOplBpRaLKxUpmqzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

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