Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e486a8e70f8f79d7f2c526009af892001c8377f193ad2733e8db14d59360949' 
  AND token = 'KC9H4qvIYnKDWTGzKqAY2tPULKcqPZENa80500pvkPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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