Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cff9a4cfd17bfd9ab61bd800cd16fbd8e9a7a25cb725cb7e5f27567a215925dd' 
  AND token = 'hG3/2HXK1xKWlVbAkayE99kI44Z19R4KBs64h9mFJsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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