Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0aebbb1ddc57873a5fd081d86126e6f73ad4cff8a4c3d08b758e38ba9a6cfc83' 
  AND token = 'OkGu4imWNa8mZKtnirL9w9rL+h09/yt59u7OCoO4w1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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