Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3dd4f715607c68fbc72781e972e941acf9e11edde4750f1eae2894dc285d886' 
  AND token = 'kpkmHuiCXLhdtqoNHejsMcErjrJfgD0EFJ0dnaAvGWQ=' 
  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"
    }
  }
}