Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1236292bed6a47f35078c12601797b56c9918fa094847c85218d7edd5f0afe9b' 
  AND token = 'rEXXcVDdlfgn1DLb8Hc/E0hxYzzhKKX3Vk71tfGgZlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}