Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '642cdb35106f08f814c1cbfad5dbfbd76c583b2be1c780b06ad5425011ea8a88' 
  AND token = 'XWhoEEl1ndrbvenfY+91o7i5Ola8aoH0o1ejCZcf1QM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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