Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2351893ca2ee6614ca3113f12268a56014e1359b7f89c3e83519298a0868dac' 
  AND token = 'me2TGCLFI3UOzjKDdifrh99gtV02Rdx5j5y8kWfCvfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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