Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adeb8d71b7779f3901c747440cad0cb55b8348745df04e2a3a4187d6e7531d66' 
  AND token = 'FAZKPUSOfllv4a3EikQMu7N2nghACIVHHhYhXeItF/U=' 
  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"
    }
  }
}