SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a41d084ef43abe04edbff51e643811ba6a224dcc3a53dc668bb60474b2348224' 
  AND token = 'ybEAt9hyAKYyO+CXvh4+sDM4GF6DxXphWn+d1TNYRYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

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