Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd122b3557cfb2f0f26063dc8cbf291705b50740f4b4147824a9d10ca38573179' 
  AND token = 'a6eV82+TVwO+d6kCqUT47N6gP21fVEya0rZ2/JHtK7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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