Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9634cad5263ae0dfca7c0c93d3316b4dd4d4231b9ed2b09c4cc0ea1aa490645b' 
  AND token = 'RETIuCt/hNNZYoXFvxzBGomUdcJxzoRQ9oVJvm/vM3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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