Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd99f2139570eba027da196e7b9b4726b4acaac5b17f3acfcc6861334adb7bbfb' 
  AND token = 'hxLD/rRtNA1I5mG/ndpb291RZSwXaA0+bsOlvl+iDls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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