Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8320ae803fb7b4bc903c8d6fde6447757f772df812674783872c1079bbde3cbf' 
  AND token = 'oXisCgosaH/nj3vGwkimJW0Sua5Xc0WIZcGDX8TkpUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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