Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49d405704efa3bc65e4daf8570f9c7750d2ec7e4891c5ff965c1d46ca07fa777' 
  AND token = 'GjgegL1KUnA79/rzP31fEvQxjVpySmgw8m9V22J/xXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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