Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efbd17175ff2723075af2f5a9fc3e0ada240c06548e3d9525d8d642711a1386d' 
  AND token = 'pHldAI9h4VtXYCShInC2tY84i5UWMvBgMvgaziy094k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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