Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88060d582817dab29c644ebf47bc484eea9997e8708488daf48a3d27a9a36d5b' 
  AND token = 'MrzW7JIhde8BB/73D2luRonqI1wtRlPUAyHUBIPIqYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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