SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c569ec04b35a2a1a3ae4e788e64f7f27ec310fd252a543cea8c28604695a45bd' 
  AND token = 'w16/05wDszD2xnpBFGonbkgPVgEqMh2DsRt5m0dnnhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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