Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c37f4272d2121cd9610c27900fdd04d5dbe4dd78510012f94cada707f429602' 
  AND token = 'cqSXwvKAwQotWkpFo3GU5u0RaYLQpn7rgoHbxgj2Gdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}