Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81e3e3982fd4297e20e6ea3da4c8758d40774f35a2052185dd92fc60e8358ec1' 
  AND token = '9DOCR6S61dYfMhsDIzjE5WaxiGn3wWfvImAdf8k5ue0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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