Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98f8f3f5ea7f62d21681d27b8fbdd3b7238ad6edcdd67cb4273a76882aa663f2' 
  AND token = 'd5TXItWZR5tV7ZHaq9zb8ocrxqEW5bBgSAB/sFdtIf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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