Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18906ffaf7dc57d7b23cd6ffa3105510f01d10f2d5d493fdebd95dc5752b1038' 
  AND token = 'RrDymeCZV3ZlEfDuFNOZngNm+GriaTEDdB7k6xLc/dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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