Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d3509bf950999e397368ac11e0d006953088d97278a703f655d58fd700e85f4' 
  AND token = '9z1Wk09B8/eK8w4uzLbPvdhL0daOoryqGAem6v1oIb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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