Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8d51a9d14b8ab90b47028f29ba3dcff01e566a77b14c373c1bca6061701407d' 
  AND token = 'H3xBRhO9LOy5oTj4/ExYetqgOOYLZuvackUzbV419Dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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