Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01872524ace870f96c5ece9d91bb0a9d3022939bbe7de9edbb0722c444de8072' 
  AND token = 'fLDMnuPYTGgKWANAqfEpE1yXOG+NEjEkifIW+4c+p4w=' 
  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"
    }
  }
}