Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddec2946de9177e0016b06ed599bbfb4681eaac5a818dc218f4c5149a3891e27' 
  AND token = 'KQCcEovw5Ph6KzkBJscY3OzcvooKumGK9FavpOtfJhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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