Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4a70915da57bae141e6778dfe088c35e8495dd4faa1a93ec0d8acea2b6d2289' 
  AND token = 'Uz19fCKPtZDWRlTi1XHo7evNGkcXCraRI+aHJf0uqU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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