SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17827d2d9e9e0178604ceef5853e69b37a5cc7f1deb57d22c6778dd7cc9d5c00' 
  AND token = 'etbBiDERO7Emyl4lD/HgAripLqeBteS8MTL2R414rPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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