Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1893971c4561db63cf79e4d18edd746bfad4cdf5349bfa5ca039c307a3af0755' 
  AND token = '2X8touDdrrUCCI8Nyw2vqpfX9eHKoUHJrQap7k2w7Dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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