Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '653d199bfe9bd5a73f026338da987d5e842472e2e77f9d6cfeb7fc4a8a9d74fd' 
  AND token = 'FIDL7NTzS0hgnJjLvMLiOxvOA4b0qJDMHjhXrqoFJeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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