Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84c03fa0f9162d1bf33b7c75c1b4a4d3294061b6ef03b3aa3159add886b72cb0' 
  AND token = 'uorvvp3evqQGUoYNAJ7LYNAyTqBlMUAfglyvHYPMwec=' 
  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"
    }
  }
}