SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d1d1f6858b0a72eb4d9dc71c6d5677f7bac91194bea1f27bed5d9f4cd151d8f' 
  AND token = 'lIoT6MgxmQe2JKL9l+GBEaFRk0/wJ2aJVqWgnp34yTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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