Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8865920f53423a4cea43750fdcc9e5eb0263d4c78cf3586802b41924def5b7c8' 
  AND token = 'M0R9Gb/MHJP1ieg4A0xh5+UwambWAMG11l4q9uQTFQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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