Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5766bed8ecbba8c251ffad9f6b78b7b8324173fe496e330253151043ac8f181d' 
  AND token = 'eSkYHDxizqq97ks0DuNoLT47Flo4xoXCFWxpLJamBp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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