Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cdc4d98ab7af4e7fac0fb0ff5a573ef28bf810626256f5d1a460043c328149c' 
  AND token = 'Aq9QLufROPysmMSxHc9WUVcivvBREbg1bXlDOFRU08s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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