SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52b3ae00816ed47993768bf0d7e2e65a318f7a3bad5ad2cf3b98c75472dc1780' 
  AND token = 'j7vZpcjF5L5CLqFlm71+KhDrHzP7h3QfwsBLw0+0BWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00076

JSON explain

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