Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2290c90c9fe4576b5e4dcc3bdad9610c43a1d0b9969623bc6bd9be5017a049fc' 
  AND token = 'aOfhi6H32nvAM8DAqtQxr/LUm0fcAPQOHYMp/GX8oqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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