Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3710bcc5a58b0f1ca0ca6d193158408fb99e84c79f41354c3c480218da865725' 
  AND token = 'fRzMUsDuB5GscUlfGTtKl2R2xAbDyJ0AKcS35MvoYFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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