Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea6890c651a93632db89dd969a2a20c7293c5c57fc47ab60573839979e5cd104' 
  AND token = '83peDN2DFloXWUJOLo1oGHluxdNboXd9x0m/wlMeDJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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