Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e95b5f0d02ec95a9b560c16dddb0bc8461ee9da2d0846347af9b1f8ac4705b77' 
  AND token = '3kUYvxzq7btnVK1F9TwDpToDxOWm6YYdGU3eM2TLcNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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