Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84108370d8e92c9175139bf41628b39c132f74f4e39484d31dd283959d033c9b' 
  AND token = 'wgSAnOw4+XcIMlBCnCBM5b50BjSoZOaIYBhxspf7blQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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