Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11f0ef230dbda929f8c69be546e89eb4a012eb0bf3ce52c78c581de47a2739ba' 
  AND token = 'ePFOGZUIFuOXLGydYUEKmkpCybBrDhToQUDGqFUWFmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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