Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a0feaaebac1f6233b8565025b888f3815e55865aea002c5b7bb4f3ca6d6a333' 
  AND token = 'p/oxMVxM7yC9Htc96D62s/Nwtj55qyphPUhEN5VXsAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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