Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e217a232ade8a09c05cbdadce75f2cb778f18b5fe6124826ec607896735fe92' 
  AND token = 'Bd5kl20fMYK7sj3xoWNKb1aYdqPWqDyn+KETqyCP+3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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