SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64e55468e3b1270167fe4460f5cee9a9c28cbc723c3c666dd4c7d3df2754e8aa' 
  AND token = 'RaSkHbtSfHN0iYto8YgFGm/o99DDJeKFHg8bI5ORt84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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