Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '464147e24efe42ba07f2fe617b383f6d9feb49dcfd556408a7e26ed251b6b5e8' 
  AND token = 'NGDyjKQH8XbP0d5rioXeOdVGSEKkEe+7EHZ/Ps6wP8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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