Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f71e75594514859a758d1e7bfc39522e3fca150778a5c8d1f87b316f9eca9f42' 
  AND token = 'dixuquKk7HdbEH/k7vu4mxtKuHcJxePzFBLcxDULEa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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