Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64581ab75ac02b403519c0f7d20612df6a528fc289f3ddd30a7914544edd391d' 
  AND token = 'Jo8ohKWzoiTL7AUkMrCqn1k8eBM8G8H0s7FldsD4bVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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