Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a4b5a6705556f80b7536e3ec082b55bbc4f3abf1610502152fd101cf260b615' 
  AND token = 'oYzp6b3KOeVyAHcg+m8V5oWNfJtxBMCSOqOrp0zsJTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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