Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e5a75313cc03bfe376cb1cf24bf4b1833172c5a9efbed21cf544654776921d9' 
  AND token = 'SiyAzWhq1Vsnltf/eOQ0wRCtxmBQ29eiII5PzKKCwn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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