Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14c81d656bdbb847768ed2e3be04506bb2058207f863fe5b95e4aa46e4a219cd' 
  AND token = 'yrrCO1q/eyB3pQ1+mbmiDpCno+zbb41QsPrKsUeGGeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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