Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77e9f1ff7373929536cf6d89a35b63cac8ff50a67cf759ddbb2772770eca11e0' 
  AND token = '8bfx2IntfL/zM4zqcJk63ftn9OWJ/PWgVT93RVWu+20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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