Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fed90d7c1dfb339994217a70b245b9c743c2d7828532c9ac8a00283c096b51b' 
  AND token = 'J/NzvQxNoHAoIm9KJxrPNHKyopKDQGSVhczaaXyfBLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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