Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc91b8e35e6f0f81859a90f2ef6a3f4640b324dc590e980811c5fb430d8f7429' 
  AND token = '8TcqNv708ouX8Y3M2f1HsMicV7PW0dgJAhqv8v1XQtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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