Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33ecb37578876abb0d3dee216df4d3ed38209678b8e116fa8fb458496417bd2a' 
  AND token = 'Dgj0BXgTFcjN8r5cLLG577PSCIik0wdgjY/3LhpkAvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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