Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c0ded68659e33d79d8fbcfd2aa66f426ef9528ccb4d71d2938aad89d19c4ca6' 
  AND token = 'saXRWj++jG8zyOGX/oTAIYujDacBoEhD57sTSns1P2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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