Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '659740ed5c3967179d6cb229d80b430495be3ddd220d81c589fedae6b9a6bdd5' 
  AND token = 'AB+dlitZmmN4Cm6p+j2qoJpnIaD7APvk9DjDMhWcE+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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