Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8a5d9ebf5a90a168c4dfde4ec54f376ec15ae63152919c24aa6166a8bc13b80' 
  AND token = 'tevmfJjGF2jfy3X7kL0fmRYnxxug3sjyGxIxG9FUuDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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