Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bbf2e9d8f6c937a5ae3fd608e22d2aa7f20b7923f4f9e7b147d3d6ab7b34f9d' 
  AND token = '6N6eoUbIWT/l7M7KXJ9Y5dX+kr1+VKd6OichVBfL65M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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