Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e85388a17ad4fad36d441e1b78484f4eb0d76ae1e6599eca3fd488c832b2eebe' 
  AND token = 'j+uHnWGuohYOnO4a7MwYepW1eC3dj10WevJHqrW/om4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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