Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '052e33d1f23aba6173447fd0de9ee1209b3eaab22ad87a207efc4be0f879f443' 
  AND token = 'hkaPwquT0yg7H06lLBOHZMdjilrEPCResDEqKi5D2Yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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