Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ecbb4184cab9f487499f3ded35c372ff5e95fc6fb550d1da5fa299b300a23b0' 
  AND token = '/sxCHisCP0+WJhRhOY9zOIkamQPoAvUJIM6f17NCU/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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