Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3060dad61dacaca6fd24e83e4e56a1323915642d103baf7c8c2ab36ed6d6ebe' 
  AND token = 'mFLm6Xj0SyOgfJvXIb6rpaTuXsPNjlUvryQJqxD5hsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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