Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bb8cf18a42856196d182c5e3c2954d22112d6c931aec0de65de65a9715628e8' 
  AND token = 'tu5XzSvBorQ1kIG3hPzWeuCRq4fU8ipAHQ4oPgk9i0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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