Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '47cea979e48a7fa3642267faa3d8281c003defbefcbeb3689a218546b3d3a19c' 
  AND token = 'uHdVcUgYmbQO4JH5+oXN8HkeNtE+DWwFXK+Mv9Avli0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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