Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ee95e6082d5cb05bf05dcdb91fd77c7796929845b00cc8e139b777df2624cdc' 
  AND token = 'MvNVE0bk8YBI3iZV0AsnFXz/OS7Zuj6ZDgYt7w7CM4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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