Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd85fd49c1009cddd3dcd43e1c06bdaab196552c22a0026a4def47c8b962e4b4' 
  AND token = 'uXhk6yyF8a6MHZEkQ8PnElKrpaxh5BGJaf6bVTSpsTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}