Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2be2dfb3b1e70e70eaedf69504a14602fbeb830a75c219a75c36b1f4cb2e67b7' 
  AND token = 'DLCIwrMvMhm/mEEWq5Od54dAtESz71Zy/MEqU1ajUE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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