Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19b37f55e089998d1b94ded1f6d50d816567b8ce6fc54058a6c1a06cd04fb249' 
  AND token = 'JU4mY3KMlxjcKOZgX0nQH/kP0yzFnC+g9WoyE1MEKC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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