Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3d79555b64e8bd63a7a73aa19c90037ddca93ab364d8e9a39a3b06959264de9' 
  AND token = 'xmfhs5TCzXSHBjNa2slJn7YHZ9vT99Fs/JFdOTtQrRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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