Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdb7b2b8639bbd5aa6283e786713eee3a5bde265d9e0da492dcfafe7cec4692a' 
  AND token = 'ApW58RgMSvuiRMkOxW7n4lv+WszTN3OYibKNmh8sEyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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