Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '406eca4af182e7273bee613efeea2d291763540aee98d7f85632deeb85150dc5' 
  AND token = 'WFN+PJm3u10bNxBF6Q5ViIK3gdqEPt5RxUAaFE0aIVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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