Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94d105c904a5c1a02936e4f6cb63706c05006169cb89112323eeb4af38ceee85' 
  AND token = 'mpjP+FPCnKsmg60W0TprzsGzG6nZlvlSJxbxgz+n1ME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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