Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa4916a3d22b1b2b7e8428ad6f859dd5c6fd6557ab88ff4ddae435e420be07b8' 
  AND token = '+QEsq3mYE6RGx25Xqnui1pO0WXJ3AmFWDoMkQr25E8E=' 
  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"
    }
  }
}