Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '233c55d27e67b9c81837f8fb17343cd80e6befe2d4dfaa71c2790b59b3667936' 
  AND token = 'LxZ/cy0lglLk8gHmDABXLbBu7WdW6Gua/BgYNEaO4ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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