Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9da0c1c5e0d979a7b7504c9343d52147997bc0e89055ab2e1a5bddbe0dff706f' 
  AND token = '4Bj0gpv922ueojfJrjyyHQGqFdRv6qf2LEnzbCTri/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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