Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4a48bd28cc057f3eebde5c80ab4bea3d48f693bd6039254986b0016fc12dcb81' 
  AND token = 'DB0uKUIp1JZQ1yrm5NaTc71+UNgmPaaeb7WYSFlLS9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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