Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5307aa0524913b4213f137b3bebf43b7416529f5b67f679d16daa23502913f6' 
  AND token = '6BczFchkjL+cc2UQvpFBqqkXXVeyaET2OKV22YvuUlM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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