Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8ed760ef03f0d96be8f215d228a90f29eaa443202fff861b206857b0ffcd6cc6' 
  AND token = '+fFfl/5VhTTR3YCpUi6kgR8sRiArVHv7YsWRUTFVoXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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