Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'defab1fd9e10dc0f87d00d1539fc6d88620bc23381c66ed7146c583f0f05af93' 
  AND token = 'y0L319YZlG4CF6sWpVl33tMYZK2Lbu0znJzGpnMMiHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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