SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '962b933ca051c5853c90775af42577275e4cb2e830c7b07993201899781bb60e' 
  AND token = 'm5dlx4CTlg+MRi8DFuKdcCCD4hKUuQW46s8/eSQW51M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

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