Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f7be735e3cf11a205ec12ebf2330abfbf023fd0c4bf6377c90c095ec61b29d6' 
  AND token = 'jOMsZPUnQuiknF/VSb1HadNBLmblNahT1Mw2sEHzPb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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