Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3262fa7afaf0ea76c6967713b9014ec507ca835e0fa9f41e90de0a91663fedac' 
  AND token = 't4mqKrvEaEzh5k1/W7Vwm2JnK/vNt+vfoG/45ptvyNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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