Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19fc55e2aa4d650e7b3aadf328e077c1d62ec491b73bd0d1c0334206e22c844d' 
  AND token = 'ivIw5Cw6VH7FCqS11BitiyNlYYbI86DdKrHwGdiweBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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