SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07ebea7d5657050ab3b0830b959ba8a9560f0fcaac1dc87f871f52bb1431fde6' 
  AND token = '8E26KcIOODamw5OwKRWcA+eVCxfoo9OFXxquoLe5MeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

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