Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23c858e8c7d691e86eca252dde53b59e49f5b31275fa792cacc46cf26ec8aa75' 
  AND token = 'YbmT4gdu1c5bnWcqg29gLGjRv3VCmf+DS6NpGZf3wRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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