Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c2593a04dd5bbfbf7a3bfea367d4e7f47fc9ce4de768164f875eaa39b51e98c' 
  AND token = '1Nk02TmIaVifn4vEAIVhjN4HgrlBzVNiAFBZqEq9TwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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