Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6b74bcb599c8aed242c1f10348db73fbbe39eeae5cfa36d06f3b6cc48c709ed' 
  AND token = 'zO8r4P7Ub8v0hTdK2eAezjm91Koz54eB9TghSmNMhGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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