Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91952dcfed142a7c2335abd7a10e21386162d1799e5908554a3854d3d38cf3e2' 
  AND token = '/xvTTNH4JGQuoZZsIy92b+NaNYclBE6/gPsqTrRaNtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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