Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da23d093f7292ae173a3167a106a37bee9739b434f6068f1e21b59bb8ed84d5f' 
  AND token = 'Gr31gpznP0r+UzwQ7bexbpA+bK2rtWnr5k8R0+gZFK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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