Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92ab13610d43bfbd90714af460432740da52608c341a61389e1b881a717ff344' 
  AND token = 'b59gEg71ASC2vbg/TkKJJozqneX8XpPjS8NFHXlNnHQ=' 
  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"
    }
  }
}