Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d636959cce71193e92124e03cf9cd09b3d171e15977f786918df0293bc8e597' 
  AND token = 'Q++dDAHA+MdEDGlKA2vtFzcAiWdoTc04Eo5volRSv+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}