SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d61cf00ba7047f5e70fe40dd88934aa168eb58f1e026cacc8365db694f2fe31' 
  AND token = 'OUicluomPYOonp3wI4eumCLNJJi5Kqo9719Z+P+7qTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

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