Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf164a53c3d6a32706124a9a3206bd16faac5eef76d3313bed89c2bc8f85cdb3' 
  AND token = '3E7vTFJihxRVDTcgAsyUoIzZ5rRjatm9CMGFfhUYagQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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