Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65b5adef5051aaeb42bf7f7cad8b43998271e019aa474722b317e583a0165504' 
  AND token = '6v1hBxaOw5G26AjOiU5SustgvwgFkPwrdLi/woGRin0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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