Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8fcb024e6111c144e4e9bcb6ac8960e22c110c4fea57ff21d9216a77b23fbe9' 
  AND token = 'pWyOj+1BObVjka4CpLGO/KKa85ohBB4kprKLbmXzxJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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