Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e6e898210fe70ffc2bf4e7a8a184d13d6739e591d5fdd22d415dbb878cb988c' 
  AND token = 'fGvUW+iqGNGDN7Thf5RQSe+OoF7ox1WTSgpgJtFSpR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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