Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01bf6fabf74b3eef03942b6e21eec4cd2d9f8b0b60c40167d150d4e9059363b4' 
  AND token = 'hudDyMzvLr2tnQsIH6dZ2A0AreugpuqHJfOujLbN8vM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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