Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f08614879f21567ebea3d9f275497e33ad411f0aa905baef8147f89ff2a9ca6' 
  AND token = '+b1UAcrtXcdXpLNgEYx2fMu9vBJewg9ziTGtCwlgAgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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