Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ce42e1d9e27dc769b0eb47c4915fe3e5d8ff74bec910e2ce82b256963bdd323' 
  AND token = 'GmihXHxa7BTcXldK0mGGVKNpFDWh+VA5TexSPJNfVc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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