Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8fcd4d8befaff159a65dbe33f016909a2ca3669f5f60f6a2a545c26dab9379f' 
  AND token = 'KdsDaQB0kdkNnbkTnoB7MDeKNLH1KIqajiZManQy/Zw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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