Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34b94e5d25234cc573ec8e58c419c6bf3ffdbacf8954b8d144627d2034d86cfd' 
  AND token = 'sfItmFmjjaWXLxWTTesFTupdwHKxY6fsVfUrhDW0qNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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