Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '78034c3b61e0a7c657c1de6a4233a7862e575c81e1e6b5f519ba909001052a01' 
  AND token = 'VlcLePSTxKpQHxLxzBiPyP+eZErNraFkPQV4wuUqD+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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