Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31bc6c220a8d8d9de3c650685fad514d0ae59760f49c53571dd6038647b86e6b' 
  AND token = 'Wb4YBaoCRypIiuiDa0TfiFTUw+kheqPrKvaT07mnupM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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