Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a1031b98e56986383d96da81f911076ea202dbe651d31631ed83c685fab9896' 
  AND token = '2OCFWAGeyIkt4j33ZVzuuIxLOpNnjn3L4Xvig8BgFeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}