Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9ba61af5a7b86b7b526354103c6663a4e159d9a7baa16c76e6733102341197a' 
  AND token = 'MOOQI6WJ8rsWOAuSSL2WtUhzrIYHQVv345pdHoaMA+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}