SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0422dc05de2ece4a5cd9bd4d55d4799ed9ff130b62051d8b476cc1918c5a32b2' 
  AND token = 'G8JFoyPQSV3xLfLYYFmi+a8IgVUGswJqrC5KVW/XZ3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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