Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbd11cc24e5f5ce911aef792a85e857b7b47700ce1c5c32e64506d6006b44c7c' 
  AND token = 'f1PUgKT2KKofNoQwKJcrAKuHFhNJ5KyZDQV5ZRUJLAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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