Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25ca4f53b8ba3421f816e51b51e3db06ea386f7a8d778c46308d824873ae769e' 
  AND token = 'KLo15ZcAAxqCeKf42ZHLePQIenaywO/5GhRDHTI+aKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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