Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81371d885ac66a8212ed2330ca5bb3664d6aa8612476858800cb1a746b50a5d5' 
  AND token = 'uG+winx/ZQPWuXj9IF/AoQmSowG7ZgAf6356cY8ewgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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