Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d6fcbd79f9c914921382bde79088deeef37b54facb3118a2affea6d779b3419' 
  AND token = 'tSWI5IBUXEKgMFOECa6Xun4qvusgjms0E/duIf3tYqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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