Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47b11de01447d8fb443d48100d693fdc52c2d7d2c153f09ceedd12ef69652cb8' 
  AND token = '++kGWvYeUAdJnSY74zmS2Ot6bFTvl/iGvqQIASNgAwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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