Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4016fee73f96e4d976cea6efff3850c76c84aa53141537b8f4bd0fb585539fdc' 
  AND token = 'WN0ekGdaSkEjD+P5SNmNNTA4OZ6DDLO6eiFCM/ODP3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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