Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58724d93d017a9601cf403738f5dea8666af95836419e422bf37387123dae4da' 
  AND token = '3iWH0X6QZatMu+FMvh9JytL0mm0Jhu4n53ktbk//yho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}