Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '088b4d7b030911bf1d972e5e2150a28ac7e7ab46a8a53ac04a75b51a6ebf96c1' 
  AND token = 'xK/AGNtE7W0b498PWykrg280OlUiPobvgD//2dAlfrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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