Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a28a9e7667a10faa783386707be5ad426a769e3f91e0c70ef80cca9b222bf6a' 
  AND token = 'FZ+qcgxNL6lNkAzWggWAFdCRBsafVNahX7kcTk4K4wE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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