Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7636c9ddd122a6133f2e47c2b1f8e3051cc495fd810a477c3b82dcf75c792ce' 
  AND token = 'le4W4ZOu5vH/Yl1kA8bveK9W8qZTdtJbXbbLgHRfNSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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