Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a7d713c38663c7d8556f7d433ffe4053ed85887dc413c37016b726242f22dc6' 
  AND token = 'DTllJd+h1LLdrgtjoPAFWWqitHh484qTObvozTeJRro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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