Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57f7e7c5f42660b46bb08caaa28556741026b1e2ddbb997f0ab952df7a5f7bed' 
  AND token = 'PQMb+7u/mvZTELDYTatxyzLSN0or/lH3zFnQUB+3zaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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