Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '026a99d4353cb3ab8e83541f07bcb871bf01b0f2299245fc1cc0490d33f40235' 
  AND token = 'ZuVBJk3k4zs3rTDRSPOeOeXXYq7ddBukj+H+Tyhsjtg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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