Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29efe02d8f8c637f4c774b91d29ca54d226f5c4c4bc301e6a03baa55427a17a5' 
  AND token = 'wqz+z6/sN2c1uNuibLC+ZbFMwoeS5xdyyV7N1/xfSnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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