Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '776a56f249eb3c0e6955fa6c3993b46be325afb4d11f4fbc95ef7df333ad4020' 
  AND token = '86jNnUX14ImzAoHS9Rh8G/e12xoGt3VFy8sBi5EI9KY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00101

JSON explain

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