Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ed64a47f529b322fd0d0d77fb580f824d647b1ae6b36011edcedd1a86d496a5' 
  AND token = 'p/KFScySU7uAFbFSHifCTiIQGZM7RiztwHhEkgMqa5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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