Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d0db00f6446e6a3e014ac378d783a941cae62dbab901bfe8bcf45ecb5b16255' 
  AND token = 'c6JpbdcQtu2iEmDin9afmtIvyvLSpC8iXZe8I2gRgR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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