Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5bda7f223472ee5f81bf27a24341ae8ca69352440aa14487d68f073400915f0' 
  AND token = '/rsumaF4ZilRcsnzAQId3DFdRyyhWv1ctO3wz+LCrqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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