Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '83956cea5e8b5aaaea0d3c27503db46792b9536bc88d58097eb492c7bed7268c' 
  AND token = '9t4cmgA6chLAq4sjUqN3P+lq54WENeE2eUO2W+K4W+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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