Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad82423e8c4b7637070d028bacbf6f1b308409d7c3af54d730bf307178a36d78' 
  AND token = 'OTZGpHTrgwFlcdqyWs1fdBbgogN3frJFtQVaNgNnaGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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