Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73460b92f60c72d0f42f1bba5a2ea63d00c1f53cd0934a8b5692fdd39478f1f5' 
  AND token = 'a24kQzMT/b5RazN64h/9bRU4oi7FKJalmtko6xsNcrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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