Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f522bb0dc43d1d097f289ffd61d2df090dd033b80d8c3608d5366d3722527c3' 
  AND token = 'QOGIUxs28fNDaDyrIEBn7Ba58C/xoZWnlCREeodkCBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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