Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b95bb08faed7e350d46d8e3249d4a4ae758292d5b55668eab80276bda8be204' 
  AND token = 'ULMyUxmfJ0i5asczC0lIGPWSE+KQtruH3d/FuOBCs/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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