Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbac5e09992266dd8d7857c22bfdbcbc4134c37c4975bed8aab98dd8261d2a5f' 
  AND token = 'x0fUVOIkbI5TDVcATYw5uCrZVZZwRSCXJJo04j/0/Zs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}