Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '488f3724268f45e3df1972609d095abe8bd1b77a0e256d3890bfd22bd2834cd1' 
  AND token = 'N1oOK6XgrVq0CSWfy9AUC9dr80hsflZOIsYF15o8tBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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