SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bc9c8106b7c069a0063e4490c16afe21b4217a7af056e82af835e8b537a1289' 
  AND token = 'qB0x5wPEUtd/yXKsiX/izOagBvXyigswnJ/hBCfXzfI=' 
  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"
    }
  }
}