Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26afa0490b93778d43dfb2beae130cefd4da726ddd484a687690bb9ffc853185' 
  AND token = 'EcU2H4H1Ncsmp9nESPCbR4VSDuecQhGpZm4NCxIsTRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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