Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e540e4a533de754fc21723000a8eec2ab92e0808a783b3216244d270dff384b0' 
  AND token = 'x83DbXERFlRagubwem7C0Z9ofMBiZu5zG5enCMU59BY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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