Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddd78e213662055c72433fed3324dda0e84b5de19736776e855f9d3f610a89ea' 
  AND token = 'tFKJuI/S1DdYt6yMHRbOGUcYHioFkPT3AZx0F66X2tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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