Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '968028e3921a0aaf56c57320d5065191c72042ccd1a025d22efa66afc32225c1' 
  AND token = 'pQuPstHYafKTu1ytwU+8a4MZIphlTplUxA+ezSaeejo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}