Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '991337696afcc61a812258fa901795f26fa4230af3934e49a98965c03f179792' 
  AND token = 'gcK5tE08DQL5Mj+MvnKRnPumZa8vnk4+DqndKpfdGR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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