Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46d817b18940ee9af7e2e0c29c5a24b2a9c93b098612f0d426575069710793bd' 
  AND token = 'NHpmDy8R/8ipPpH1gAC54owHbLJT/DAg6E5pN7FbDFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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