Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dee32fa1d422411cd5f0d02628fb74d7d6f977dca8f2e80f80305b4439b23d0a' 
  AND token = 'UW7UZVdD7clu0To6GdU6RQ04te+4axvvu5hFHyEXbls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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