Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2bf818724fdf740397666d72dfd6c374f79c1d8c0688b7d21a4927c367474da' 
  AND token = 'DtguCEmXO6nrGnQ20IXEWDGm9DZKJifJ8YPU/C6AMe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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