Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40c1bedefc070e47ce0ee6e438cfb1a55d7791eef1c545d790e46b01477a7b96' 
  AND token = 'jfotWNTBoM5ydP6FrOU4HP2jX0Wl7C7jCSh0Zx8wlLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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