Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97d5f74777d1ed71d124ffe5f5b2dd77a4c32422ce9da85e258dd8259c30efd8' 
  AND token = 'czAd5EX39KHpQFozPWaWvNxiUD2B8IXzK3KaCuxjPpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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