Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bacc553658d675170bf9c48098957b7baa6faf7163a1cf1d265caeffd3a49bc' 
  AND token = 'YYUpSCZncFJd2yZnCDTRY8uWGhjsd9paT7ijKFUpCEY=' 
  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"
    }
  }
}