Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '170f436ac032c1ba393aea297f35f2987fb54a95fc8df80e3b43ede1e84b5634' 
  AND token = 'v9l9CvulVezx64eO24Ec9Dyu5Sgz8wcwtNd0nMduOIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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