Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98b3d27f59e1d544a106b29d289173be40fa756104d3e21e0ffec078e8ed680c' 
  AND token = 'ra+uoJy8oXVLC1o62q1ynAF/boNCBm1g7Hv5H0KuG4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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