Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c2d81b561540b02771bd09f806a7a322405bb4039a4274cd7f79b1b729b3dbb' 
  AND token = 'NIXK535TjE+NIcWYnaPACnBaiOzD+FFJV9Yw6LX0DMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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