Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '048170706e8f2a6d920bca615cfa657277d4951751fab7c83bf421e07a0e1363' 
  AND token = 'km349TesvtCoi5K19YkFnBnJR1NooEls/8j5E2UWga0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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