Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba096b4cb934bc99b5f27443d63dce38c51d872f674418f0c63799b6b2d18bc2' 
  AND token = '/WhFx468NG0tseylLb9kI8H9n4A9xVgDY2NixKSGSF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}