Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66698ae498104f2cccd8737d3083f14b835df0510260b4ffdc6ea882c32ebce6' 
  AND token = 'HwTrKLCvMCPXObqMW8b7g/7QuNvX5SkSckVKrLKiczI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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