Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '115be575a53b8cd467c4465026d69af4153c67e359f4f5047eb3817374f7d05b' 
  AND token = 'taiiTzoHuI6WXibRNPTe4LhulUWprikXmz0nyOv1akw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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