Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bac409d17c5f4cfabb98615e0667ba67435a75bd31d5c1efa41a73fa37510ff' 
  AND token = 'xLoIXZek6VZtu2wTq/uP5WkYZZlxWshcQyLgnXbbuAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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